pdfcrack Activity
Status: Beta
Brought to you by:
confusion42
Activity for pdfcrack
-
Audrey Michel posted a comment on a blog post
i want to remove a password on a pdf
-
Henning Noren created a blog post
pdfcrack 0.21
-
Patching the md5-code
-
pdfcrack-0.21 has been released with the patch included. Thanks!
-
pdfcrack-0.21 has been released with a fix for this issue.
-
pdfcrack released /pdfcrack/pdfcrack-0.21/pdfcrack-0.21.tar.gz.asc
-
-
Joao ERIBERTO Mota Filho posted a comment on ticket #14
Hi Henning! Thanks a lot for your nice work.
-
Fails to build with GCC 15
-
Closing, bug #14 covers it.
-
11 years of Debian maintenance of my 19 year old toy, and still going strong Eriberto! How can I not release a fix? :-) I shall have a release out before Sunday with this and the FreeBSD patch. Kind Regards, Henning Norén
-
Fails to build with GCC 15
-
Sorry for my mistake. This is a bug, not a patch. I will post again as a bug. Feel free to close here.
-
Fails to build with GCC 15
-
john89907643 posted a comment on discussion Help
Hello, Recently, I've tried unsucessfully to read my user manual to my motherboard and another user manual to a piece of electrical equipment I've been looking at. URLs (I can't directly link to the MB manual): https://www.asus.com/us/motherboards-components/motherboards/tuf-gaming/tuf-gaming-z890-plus-wifi/helpdesk_manual?model2Name=TUF-GAMING-Z890-PLUS-WIFI PRIME PROART TUF GAMING INTEL 800 Series BIOS Manual (English Edition) https://res.cloudinary.com/iwh/image/upload/q_auto,g_center/assets/1/7/RIgol_MHO2000_User_Guide.pdf...
-
The error indicate that pdfcrack could not find the standard security handler, which is most likely because the document does not use one or there is some newer PDF version that changes things. From the output you pasted, I cannot see the encrypt object that pdfcrack is looking for so it explains the problem (it is unable to find the information needed to start cracking). The first question is of course what kind of encryption that is used, if any, in this document? Is it password protected and if...
-
Not sure what is going wrong, but this should work: pdfcrack -o -f ./file.pdf -l=./savedstate.sav although both the "-o" and "-f ./file.pdf" are unnecessary, and the following is all that is needed: pdfcrack -l ./savedstate.sav Since all the information for cracking is in the savedstate. I have not heard of a problem with macOS, but to be honest I rarely run it anymore and have no mac to test on. The only thing I can think of is that you did a second run (maybe "pdfcrack -o -f ./file.pdf -l=./savedstate.sav"),...
-
Ashley Zoe posted a comment on discussion Help
Hi, I'm trying to decrypt password for an PDF but i receive the Error: Could not extract encryption information. %PDF-1.6 %���� 1 0 obj << /AcroForm 2 0 R /Metadata 3 0 R /Names 4 0 R /OpenAction 5 0 R /Outlines 6 0 R /PageLabels 7 0 R /PageLayout /SinglePage /PageMode /UseOutlines /Pages 8 0 R /StructTreeRoot 9 0 R /Type /Catalog endobj 10 0 obj << /Author <ab77950314353fc3feea4756083d6fe5fd1c452b7ef787e4> /CreationDate <a224cc56054e6797bea91a0a154f3ba6bf48505f28aec4> /Creator <a77a9104515616c1fcf5495250595ee1fb58544935aecdb8>...
-
okw posted a comment on discussion Help
I tried to brute force crack an owner password yesterday, and it ran for several hours: pdfcrack -o -f ./file.pdf Reached 6 characters before I had to cancel it (ctrl+c). I tried to resume based on the saved state file, but it starts with 1 character. Tried: pdfcrack -o -f ./file.pdf -l=./savedstate.sav pdfcrack -o -f ./file.pdf -l ./savedstate.sav pdfcrack -o -f ./file.pdf --loadState=./savedstate.sav pdfcrack -o -f ./file.pdf --loadState ./savedstate.sav Is it a bug or something I do wrong? I'm...
-
Mikhail T. created ticket #4
Patching the md5-code
-
Franz Kolmberger created ticket #2
Pattern of password
-
Kjetil Kilhavn posted a comment on ticket #17
Thanks for the command line trick - I'll copy that to my ReadMe.pdfcrack file :-) It's soon 30 years since I last coded anything in C. Haven't looked at the source code yet (just downloaded it), and with the tasks for the marching band and an archery club there's not a lot of time available. This is a stereotypical 'scratch my own itch' situation, and national holidays are coming up to celebrate the end of the year (or 'turning of the sun'). Maybe I can find time to brush the dust off my C knowl...
-
Thank you very much for the quick feedback. I will try that for the next note set. Late last night I found the password for "Away in a Manger" by educated guessing. It also worked for another note set, but not for the next one - so while I keep thinking about educated guesses and ask the previous chairman of the board for his educated guesses the computer may just as well spend some CPU cycles on attempting to crack it.
-
Actually, had to just do some checks and there is a issue in pdfcrack for loading charsets starting with space. Turns out silly old fscanf was too hard to use for me so I need to look into that, but in the meantime, just move the space from first to second character of the string and you should be fine. I just tested that here. I will see if I can find a fix for it, but it is old code and I need to remember how to make a new release so no promises.
-
I totally missed the bug... yeah.. I need to look into that with the savedstate.txt loading and what is going on. Will get back to you regarding that this weekend when I find some time to remove the dust around the code
-
Thanks for the request! I posted a response in the bugticket how to handle those, but I would not be reluctant to patches for the same if anyone would bother coding them up. In case sourceforge ever manages to mess up the links to bugs, here is the trick: * Put the charset you want in a file (usual UTF8 encoding, should probably be standard nowadays) * Use iconv to convert the file to your chosen encoding (here ISO-LATIN-1): iconv -f UTF-8 -t ISO-8859-1 latin1.txt > latin1-actually.txt * Read in...
-
Oh boy, this little project keeps giving still! Thanks for the report! First of all, you need to be careful that the characters used are actually latin-1 encoded, not just part of the set. In this case the file you provided seems to be UTF-8 so I started by making it latin-1: $ iconv -f UTF-8 -t ISO-8859-1 latin1.txt > latin1-actually.txt $ file latin1-actually.txt latin1-actually.txt: ISO-8859 text $ wc -c latin1-actually.txt 191 latin1-actually.txt $ wc -c latin1-actually.txt latin1.txt 191 latin1-actually.txt...
-
Options to specify character set as Latin-1 or full Unicode
-
Unable to use full Latin-1 character set
-
This is now resolved in pdfcrack-0.20 where the correct error message should be printed.
-
pdfcrack 0.20
-
-
-
Sorry for the late reply. This looks very much like something is going on in the pdf-file, triggering a bug in the parsing in pdfcrack so that the Encrypt object is not found. I would love to get a copy of the file if you can (send it to henning.noren@gmail.com) so I could investigate. Note however, that solving that would only make pdfcrack print the correct error-message. The underlying issue with pdfcrack not supporting the latest pdf-encryption methods is and will still be present. Sincerely...
-
Buddy posted a comment on discussion Help
This is the command and version to skip the password list and use the correct password. The password works in Adobe Reader. ─$ pdfcrack -f filename.pdf -p P@ssW0rd123 Error: Could not extract encryption information ┌──(kali㉿kali)-[~] └─$ pdfcrack -v pdfcrack version 0.19
-
Hi Buddy, My guess is that you are running a older version of pdfcrack as pdfcrack 0.19 should print a different error for this: The specific version is not supported (Standard - 6) I can not see a issue with parsing the encrypt object so if you have the time, please try with the latest version (v0.19), just to confirm that this is not a tricky pdf to parse. Do note that pdfcrack does not support the latest version of the pdf-standard so it will not work no matter what, but it should at least give...
-
I hope this helps. 11 0 obj <</CF<< /StdCF<< /AuthEvent /DocOpen /CFM /AESV3 /Length 32>>>> /Filter /Standard /Length 256 /O(û¾\(69¢upGz°î 3³FÉ»‘cÂÚMAH`:çE41¢²$w.˜g,Z-G¾Ç ) /OE(S6:mèÖFŒ¿—Å̇J?.õŠVIì”Æg~ÐJïžÆ) /P -1028/Perms( 4ªÿøròø_7m¤d) /R 6 /StmF /StdCF /StrF /StdCF /U(m‹ÉŒdœ¥¨uœ’[.:Em„!gk Gþ©\n¬ÿ8§Ö轺P3a\(û[ \r#à ) /UE(EÕF `ŠmP|ÖÙÞqñ..=” _Û>$c׊,ADI) /V 5>> endobj
-
I hope this helps. 11 0 obj <</CF<< /StdCF<< /AuthEvent /DocOpen /CFM /AESV3 /Length 32>>>> /Filter /Standard /Length 256 /O(û¾(69¢upGz°î 3³FÉ»‘cÂÚMAH:çE41¢²$w.˜g,Z-G¾Ç ) /OE(S6:mèÖFŒ¿—Å̇J?.õŠVIì”Æg~ÐJïžÆ) /P -1028/Perms( 4ªÿøròø_7m¤d) /R 6 /StmF /StdCF /StrF /StdCF /U(m‹ÉŒdœ¥¨uœ’[.:Em„!gk Gþ©\n¬ÿ8§Ö轺P3a\(û[ \r#à ) /UE(EÕFŠmP|ÖÙÞqñ..=” _Û>$c׊,ADI) /V 5>> endobj
-
I am trying to crack a pdf file i know how the password should be and i created a list of passwords. however i am receiving the following error Error: Could not extract encryption information. Document properties File name: XXXXXX.pdf File size: 53.5 KB Title: Untitled-1 Author: XXXXXX Subject: - Keywords: - Created: 10/11/22, 1:12:34 PM Modified: 10/13/22, 1:07:06 PM Application: PScript5.dll Version 5.2.2 PDF producer: Acrobat Distiller 22.0 (Windows) PDF version: 1.7 Page count: 1 Page size: 8.50...
-
At the bottom of the PDF . /Encrypt 11 0 R /Filter /FlateDecode /ID[<ba885a614d52593eed978a5feceed2a0><2AED01A399F89C4E94D03E8DD04C254D>]</ba885a614d52593eed978a5feceed2a0> /Index[2 1 9 1 11 1 13 1 35 11] /Info 9 0 R /Length 61 /Prev 116 /Root 12 0 R /Size 46 /Type /XRef /W[1 2 0]>>stream hÞbb\–‰10žéÿÞ>&¦ŸL ŒJ@ÜÍÄÀÚ¤%؉a5® b5 ;•‰3È–0 pð Z endstream endobj startxref 54374 %%EOF
-
Hello Buddy, The error indicate that pdfcrack did not find a valid Encrypt object in the file and there could be multiple reasons for that. Probably pdfcrack does not support the encryption-variant used here, but to be sure there is no bug could you also look for the encrypt object in the file? You can find it by grepping for "11 0 obj" in the file and you should find something that looks like this: 11 0 obj % PdfSharp.Pdf.Security.PdfStandardSecurityHandler << /Filter /Standard /R 3 /V 2 /Length...
-
Hello Simba, Sorry about the issue, but pdfcrack is in maintenance-mode and, unless someone produces a patch to support newer pdf-versions, I would not expect anything to happen in the next few years. Sincerely, Henning
-
simba posted a comment on discussion Help
Hello I was trying pdfcrack on one of my files and have forgotten the password but I keep getting above msg the specific version is not supported. Will there be an update coming up or what am i doing wrong. Thank you so much in advance for any help.
-
Dear Eberhard, As far as I am aware, there is no significant speedup that can be made based on specific character-group-modes (such as all numbers). There is really nothing special about numbers or characters when in comes to the password for a PDF and precomputing for common groups is not feasible due to various factors that always are unique for the PDF (such as document ID). The solution you suggested of limiting the character set and length is the correct one for these cases. Kind Regards, H...
-
Eberhard W Lisse posted a comment on discussion Open Discussion
Hi, I wonder if an option to cover the choice of numbers as password might speed things up? -c0123456789 -n10 -m10 did the trick, but could perhaps be sped up that way? greetings, el -- Dr. Eberhard W. Lisse \ / Obstetrician & Gynaecologist el@lisse.NA / * | Telephone: +264 81 124 6733 (cell) PO Box 8421 Bachbrecht \ / If this email is signed with GPG/PGP 10007, Namibia ;____/ Sect 20 of Act No. 4 of 2019 may apply
-
Gerd Pommerenke modified a comment on discussion Help
Hello Henning, The file is under ... Best regards Gerd
-
Hello Henning, I sent you a Dropbox-link directly via email Best regards Gerd
-
Hello Henning, The file is under https://www.dropbox.com/s/y2u0osnmenifazv/Drinks1.pdf?dl=0 Best regards Gerd Am 24.08.20 um 21:14 schrieb Henning Noren: Hello Gerd, I will try to find some time this week to see what can be found about this very old pdf-spec, as the oldest I find does not cover revision 1 of the encryption handler. If you could send me the file to my gmail adress ( henning.noren@gmail.com) or send me how to search for it that might help, or I might be able to circumvent the protection...
-
Hello Gerd, I will try to find some time this week to see what can be found about this very old pdf-spec, as the oldest I find does not cover revision 1 of the encryption handler. If you could send me the file to my gmail adress ( henning.noren (at) gmail.com) or send me how to search for it that might help, or I might be able to circumvent the protection for you. Kind Regards, Henning
-
Hello Gerd, I will try to find some time this week to see what can be found about this very old pdf-spec, as the oldest I find does not cover revision 1 of the encryption handler. If you could send me the file to my gmail adress ( henning.noren@gmail.com) or send me how to search for it that might help, or I might be able to circumvent the protection for you. Kind Regards, Henning Norén On Mon, 2020-08-24 at 17:51 +0000, Gerd Pommerenke wrote: Hi Henning, The file is from 1999 anywhere in the Internet....
-
Hi Henning, The file is from 1999 anywhere in the Internet. It was for free and I found already a second one. The owners sharewarebooks et. al. no longer exists (out of business) and I cannot make an actual PDF-version to open it with the latest software. I don't know with what Acrobat version the file was produced. According to the (c) Acrobat 3, maximum 4. I tried to send the file directly to you via email but it was blocked. I don't know if I can upload it here. I made a screenshot of the (c)...
-
Hi Gerd, Thanks for the report! This particular pdf is not really following the pdf-standard (I had to recheck 1.3 to see if it was different back then) and I have never seen anything like it before so I am not sure what to do with it. The main problem, from a brief check, is that the Encrypt object below (binary strings edited out with "..."): 1461 0 obj << /Filter /Standard /R 1 /Owner ... /User ... /Perms ... /V 1 endobj Should not spell out "Owner", "User" and "Perms" but should instead look...
-
The attachement was wrong. Here the correct one.
-
I have the same problem with a very old pdf from Acrobat 3. I can it open without password with Reader 5.0 on a Mac. All later versions ask for a password on open. I cannot save it in a later format because it's forbidden to re-distill. Printing is allowed and an owner password is set but no user password. pdfcrack 0.16 (Ubuntu) says: Could not extract encryption information. All other tools failed too. I will attach the beginning of the PDF as txt. The whole file is 4.3MB.
-
Unfortunately no news, pdfcrack is basically in maintenance mode for me as I have little interest or update it (although I do update for bug-fixes still, if reported). The latest PDF standard is at least added to now poppler (probably xpdf also, that pdfcrack was based on) so those libraries could exemplify how to support it if someone puts some time into it. Patches are welcome, but currently I have no real interest in doing it.
-
David Jameux posted a comment on ticket #16
Any news on this request? PDFcrack seems great but I used it for the first time today and it returned "The specific version is not supported (Standard - 6)" which apparently means that 256-bit uncryption is not supported. So I am looking forward to the next update... Many thanks for the work already done!
-
Matt Champlin posted a comment on discussion Help
Wow, thanks for the timely response! And that is exactly what I was looking for. Thank you!
-
Hi Matt, The various fields are taken directly from the PDF Document Specifications. You can find them at the PDF below, p55 in chapter "Encryption": https://www.adobe.com/content/dam/acom/en/devnet/pdf/PDF32000_2008.pdf You can mostly ignore those fields, unless you do development, and they show what is needed to verify a password. There might be more fields needed to decrypt the actual document or when using special security handles or newer revisions.
-
Hi, Thanks for the great tool! I've been using it for just a day and already have had success with it. However, I am having a bit of trouble understanding the full output. Is there a resource that defines what each field means? PDF version 1.3 Security Handler: Standard V: 2 R: 3 P: -1852 Length: 128 Encrypted Metadata: True FileID: b3909b5523f6b1ceca6b1d3e4f9a55ee U: b5e8aab71559346b90375ccc1e8a567500000000000000000000000000000000 O: 5e3347810f0e147ed33e61562286931ab0ecf3533b095ff2bf5be6f9befd297f...
-
manpage issue
-
stack-buffer-overflow
-
Fixed in pdfcrack.0.19
-
pdfcrack 0.19
-
-
-
Hi p1ay8y3ar! Thanks for the bug-report! On the one hand it is in a completely useless part of the code (save-files with wordlists, which does not really work so noone is likely to use it, and for lengths that should not be possible to use in a pdf) but it did send me in a hunt that made me find a problem with my md5-calculation (although, for sizes that is not possible in pdfs - so bug cannot really happen in reality) and since the pdf-specification is not clear how to handle pdfs with encryption...
-
p1ay8y3ar created ticket #12
stack-buffer-overflow
-
Oleg posted a comment on discussion Help
Works perfect! Thank you!!!!!!!!!!!!
-
pdfcrack 0.18 is out
-
pdfcrack 0.18 was just released with a (very ugly, but working) fix for this. The parser is really cheating and I am surprised it is still working so well. Someday I might get the motivation to rewrite it properly but that has been on my todo-list since I first wrote it so I guess that might take another 10 years or so :-) Hopefully this should work for you at least! Kind Regards, Henning Norén
-
-
-
Thanks! Turns out that you have encountered a bug in pdfcrack and its broken parser of pdf documents. I am amazed that this have not turned up before. I am currently trying to figure out a way to resolve it quickly without breaking parsing other pdfs I have but in the meantime you can work around it by making a copy of the pdf and then just make a linefeed right before the number 47 if you search for the following string inside the file: endobj 47 0 obj <</Filter or if you can run the following (the...
-
Here is. It doesn't start to check. Is this a situation when pdfcrack can't understand that file is encrypted?
-
Hi Oleg! Please provide the pdf and I will have a look. The wordlist is not needed, as the error indicate that pdfcrack is unable to find something that indicate a valid encryption-object in the pdf-file. You can either attach it here or sent it to me privately and I will reply here. Kind Regards, Henning Norén
-
Hello My version is pdfcrack-0.17 I'm trying to crack PDF file, and I know the password in my list. However i am receiving the following error: Error: Could not extract encryption information Command line: pdfcrack -f 123.pdf -w 123ch.txt I can provide files: 123.pdf and 123ch.txt for examination Best Regards
-
Hello My version is pdfcrack-0.17 I'm trying to crack PDF file, and I know the password and i put in my list of words. However i am receiving the following error: Error: Could not extract encryption information Command line: pdfcrack -f 123.pdf -w 123ch.txt I can provide files: 123.pdf and 123ch.txt for examination Could you help me, please? Best Regards
-
I am not maintainer of the Linux Mint package (or any other package for any distro) so you need to get in contact with the people at your specific distro to ask them to update. Normally this happen after a while when/if they notice that a new release is out but it could take a while in some cases, depending on how active they are. Often it is quicker if you contact them but I am not familiar with Mint so I do not know how they are handling it. You can also test it locally by grabbing the code from...
-
hima posted a comment on discussion Help
Hello Henning, I have Linux mint i tried apt-get update then upgrade unfortunatly it it still using version 16. Did you update Linux rep also? Thanks hima
-
I just made a quick hack to handle this issue and released it in 0.17, available now. If you could test your original pdf with this version and report back how it works, that would be lovely! The latest version contains some other small fixes that was made since the last release but there is no substantial changes in there. Thanks again for your excellent report and followup that fixed this issue! Kind Regards, Henning
-
Not dead yet
-
-
-
-
Great it worked after removing the String, please infor when the new version is available. Thanks
-
Great it worked after removing the String Thanks
-
Thanks! Seems like pdfcrack never expected a comment to be present after after "obj"-string, only whitespace is handled there. I will have to try to fix that and read up a bit on the specs and the code, which might take a day or two before I can make a new release so in the meantime you should be able to work around it by: Make a copy of the pdf In vi-editor, go in and remove the string "% PdfSharp.Pdf.Security.PdfStandardSecurityHandler" run pdfcrack on the file and see how it works Note that this...
-
Hello Henning, thanks for your quick reply. the version i am using is 0.16 the begining of the file is PDF-1.4 %ÓôÌá % PDFsharp Version 1.32.2608.0 (verbose mode) % Creation date: 4/16/2018 4:23:25 AM % Creation time: 0.000 seconds % File size: 110962 bytes % Pages: 4 % Objects: 64 %-------------------------------------------------------------------------------------------------- 1 0 obj % PdfSharp.Pdf.PdfDocumentInformation << /CreationDate ("àÍW 2#míÕl‡ˆZOgO»ím) /Creator (6žrŽxpg|êËkšˆYToVÏ«õ=‡R”D–÷éþàRVz®/)...
-
Hi Hima, I am unable to determine if it is a valid or supported pdf based on only that information. Could you open the pdf in a editor and search for "64" inside it to try to locate the Encrypt object and show it, or mail it to me? Even better would be if you could mail me the pdf in full (I will not share it with anyone else). The Encrypt object should look something like this in VI (note the start of the object should be 64, as stated in your trailer, but the rest of the content might vary): 64...
-
Hello, I am trying to crack a pdf file i know how the password should be and i created a list of passwords. however i am receiving the following error Error: Could not extract encryption information command pdfcrack -f filename.pdf -w list.lst trailer << /Encrypt 64 0 R /ID 414552215 /Info 1 0 R /Root 2 0 R /Size 65 startxref 109481 %%EOF Best Regards
-
Hello, I am trying to crack a pdf file i now how the password should be and i created a list of passwords. however i am receiving the following error Error: Could not extract encryption information command pdfcrack -f filename.pdf -w list.lst trailer << /Encrypt 64 0 R /ID 414552215 /Info 1 0 R /Root 2 0 R /Size 65 startxref 109481 %%EOF Best Regards
-
Hello, I am trying to crack a pdf file i now how the password should be and i created a list of passwords. however i am receiving the following error Error: Could not extract encryption information trailer << /Encrypt 64 0 R /ID 414552215 /Info 1 0 R /Root 2 0 R /Size 65 startxref 109481 %%EOF Best Regards
-
Filipe posted a comment on discussion Help
I know the last 4 digits of my password. Is possible to set them and only look for the first 4 digits?
-
J SJ posted a comment on discussion Open Discussion
it's user password, there are sites that can crack owner passwords online. anyway, I tried both -o and -u. same result.
-
I have the same problem. There is not much instructions for this.
-
Hans1978 posted a comment on discussion Help
@Henning Noren ok it works But the format to search has to be always only xx.xx.xxxx or even better xx.xx.19xx pdf crack searchs like this following format and the searching is very slowly. .941778... 471.34....
-
@Mikey, Not sure what the problem might be. If you are willing to share the PDF with me I could take a look at it. You can mail my sourceforge mailaddress.
-
@Marty, This is currently not possible, unless you do some fiddling with a .sav-file. The only supported way is to limit the charset, and in the cases above you could limit it to: A1234567890 Which would speed it up a bit. For better options you will need to create your own wordlist (there are plenty tools around and your wordlist would only contain 9999 entries so should be fairly short).
-
As earlier, you limit the charset to the characters that exist in the pwd, so for matching everything with numbers and dots, you type: pdfcrack --charset=.0123456789 test.pdf
1 >
