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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.
pdfrip is a fast multithreaded PDF password cracking utility written in Rust with support for wordlist-based dictionary attacks, date, number range, and alphanumeric brute-forcing, and a custom query builder for password formats.
21 Ιουλ 2021 · A password remover tool removes the encryption, and creates a new protection-free file without any password. If you've ever encountered a locked PDF file, it can be a nightmare. Here's six PDF password remover tools to unlock them.
10 Μαΐ 2020 · Solution. Step 1: An encrypted PDF (PDF 1.4–1.6) file is provided in the home directory. Extract the crackable information from the file using John the Ripper tools. Command: tools/JohnTheRipper/pdf2john.pl secret.pdf > hash. Extracting crackable information. Step 2: Once the crackable information is ready, the user can either of two tools:
hashcat is the world's fastest and most advanced password recovery utility, supporting five unique modes of attack for over 300 highly-optimized hashing algorithms. hashcat currently supports CPUs, GPUs, and other hardware accelerators on Linux, Windows, and macOS, and has facilities to help enable distributed password cracking.
8 Σεπ 2020 · PDFCrack is a GNU/Linux (other POSIX-compatible systems should work too) tool for recovering passwords and content from PDF-files. It is small, command line driven without external dependencies. The application is Open Source (GPL).
23 Ιουλ 2021 · Do you have a PDF document lying around somewhere, but it's encrypted and you've forgotten the password to it? hashcat is a great open-source hash cracker with GPU acceleration. It also comes with features such as masking, dictionary attacks and even statistical methods of password guessing.