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