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 so, do you know what kind of security mechanism is used?
pdfcrack only supports older versions of Adobe standard security handler and external handlers might give these issues, as well as too modern pdfs.
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
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
Someone can help me?
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 so, do you know what kind of security mechanism is used?
pdfcrack only supports older versions of Adobe standard security handler and external handlers might give these issues, as well as too modern pdfs.