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. The main PDFCrack features are: - Supports the standard security handler (revision 2, 3 and 4) on all known PDF-versions. - Supports cracking both owner and userpasswords. - Both wordlists and bruteforcing the password are supported. - Simple permutations (currently only trying first character as Upper Case). - Save and load a running job. - Simple benchmarking. - Optimised search for owner-password when user-password is known. This program can be used in forensics investigations or similar activities, to legal password crack.

root@kali:~# pdfcrack -h
Usage: pdfcrack -f filename [OPTIONS]
OPTIONS:
-b, --bench		perform benchmark and exit
-c, --charset=STRING	Use the characters in STRING as charset
-w, --wordlist=FILE	Use FILE as source of passwords to try
-n, --minpw=INTEGER	Skip trying passwords shorter than this
-m, --maxpw=INTEGER	Stop when reaching this passwordlength
-l, --loadState=FILE	Continue from the state saved in FILENAME
-o, --owner		Work with the ownerpassword
-u, --user		Work with the userpassword (default)
-p, --password=STRING	Give userpassword to speed up breaking
			ownerpassword (implies -o)
-q, --quiet		Run quietly
-s, --permutate		Try permutating the passwords (currently only
			supports switching first character to uppercase)
-v, --version		Print version and exit