PDF Password Remover

A comprehensive solution for removing passwords from PDF files, including support for AES-256 encryption.

Features

• Supports AES-256 encrypted PDFs
• Handles both user and owner passwords
• Follows PDF 2.0 specification for encryption
• Detailed error reporting
• Preserves PDF structure and content

Requirements

• Python 3.x
• PyCryptodome (for AES encryption)

Installation

pip install -r requirements.txt

Usage

Remove a password from a PDF file:

python main.py <input_pdf> <password> <output_pdf>

Arguments:

• <input_pdf>: Path to the encrypted PDF file
• <password>: The password for the PDF file
• <output_pdf>: Path to save the decrypted PDF file

Example

python main.py encrypted.pdf mypassword decrypted.pdf

Technical Details

This implementation:

• Supports PDF 2.0 encryption specification
• Implements AES-256 decryption
• Handles encryption dictionaries
• Preserves PDF object structure
• Properly manages stream decryption

Limitations

• Only supports standard security handler
• Requires correct password for decryption
• May not support all PDF versions