36 lines
1.0 KiB
Markdown
36 lines
1.0 KiB
Markdown
# SANS Courseware Watermark Remover
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Removes personalized SANS “Licensed To …” watermarks (names, emails, hashes, dates) by deleting the actual `BT…ET` text objects in the PDF—no white boxes, no selection artefacts.
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## Quickstart
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1. **(If encrypted) Decrypt first with `qpdf`:**
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```bash
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qpdf --password='<YOUR_PASSWORD>' --decrypt INPUT.pdf INPUT_unlocked.pdf
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```
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2. **Install dependencies (Python 3.9+):**
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```bash
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python -m venv .venv
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source .venv/bin/activate # Windows: .venv\Scripts\activate
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pip install -r requirements.txt
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```
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3. **Run the sanitizer (auto-creates `<input>_clean.pdf`):**
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4.
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```bash
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# Recommended latest script:
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python enhanced_sanitize_pdf.py INPUT_unlocked.pdf
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```
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## Notes
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* The tool targets common SANS watermark patterns:
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* Invisible 36-pt text with rendering modes 1/3,
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* Rotated diagonal overlay using −25-pt fonts,
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* Footer lines at 10/18-pt.
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* If your course PDFs use different fonts/sizes, adjust the regex patterns inside the script.
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