forensicsProeasy

Invisible Ink

tjctf

Task: 638KB PDF polyglot file with hidden text, appended ZIP archive, and swirl-distorted PNG image. Solution: extract hidden password via pdftotext, carve ZIP from PDF trailing data, decrypt archive, reverse ImageMagick swirl distortion to read flag.

imagemagick zip hidden_text pdf polyglot pdftotext password_protected_zip swirl_distortion

zip_password_extractionpdf_hidden_text_extractionpdf_polyglot_extractionimagemagick_swirl_reversaltrailing_data_analysis

$ ls tags/ techniques/

imagemagick zip hidden_text pdf polyglot pdftotext password_protected_zip swirl_distortion

zip_password_extractionpdf_hidden_text_extractionpdf_polyglot_extractionimagemagick_swirl_reversaltrailing_data_analysis

Analysis

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

$ python3 exploit.py --target 192.168.1.1 --port 8080
[*] Connecting to target...
[+] Shell obtained!

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