pdfcrack
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PDF Crack
Code and documentation are copyright 2006-2008 Henning Norén
Parts of pdfcrack.c and md5.c is derived/copied/inspired from xpdf/poppler and are copyright 1995-2006 Glyph & Cog, LLC.
The PDF data structures, operators, and specification are copyright 1985-2006 Adobe Systems Inc.
Project page: http://sourceforge.net/projects/pdfcrack/
pdfcrack is a simple tool for recovering passwords from pdf-documents. It should be able to handle all pdfs that uses the standard security handler but the pdf-parsing routines are a bit of a quick hack so you might stumble across some pdfs where the parser needs to be fixed to handle.
Type 'make' (or 'gmake' if you have BSD-make as default) to build the program. You will need to have GNU Make and a recent version of GCC installed but there are no external dependencies on libraries. You will have to add the -march-switch in the CFLAGS-option in Makefile for best optimization on your platform. Look into the GCC-manual (http://gcc.gnu.org/onlinedocs/) if you are unsure.
The program is distributed under GPL version 2 (or later).
Features available in this release (check TODO for features that might come):
- Both owner- and user-passwords with the Standard Security Handler, rev 2 & 3.
- Search by wordlist
- Search by bruteforcing with specific charset
- Optimized search for owner-password when user-password is known (or empty)
- Extremely simple permutations of passwords (makes first letter uppercase)
- currently only useful for bruteforcing with charsets:
- Auto-save when interrupted (Ctrl-C or send SIGINT to the process)
- Loading saved state
- currently only for bruteforcing with charsets:
- Minimum length of password to start at
- Maximum length of password to try
Sort your wordlist by length for best performance and consider that almost all passwords in PDFs are in iso latin 1 so use the correct character encoding in your terminal and/or wordlist when using special characters.
This tool can not decrypt a Password Protected PDF. Look up the pdftk toolkit which can do that, when you know the password.
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