Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aad23b6b47979eb…

MALICIOUS

PDF

36.9 KB Created: 2021-09-28 13:12:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 99eb9a15cf0fc726ec4e71a3206cad23 SHA-1: eb4e9b9abb6cef46530b823003bafa973136f0bc SHA-256: 9aad23b6b47979eb7f0fd33ac490f534a27847c8a6a10e4b4ae95a95c55277b5
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and presents as an image-only document with an action trigger, a common technique for phishing lures. The document body is heavily obfuscated, but the presence of JavaScript and an external URI suggests it is designed to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7016

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 36 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://pixomot.ru/uplcv?utm_term=minecraft+diamond+finder+cheat PDF link annotation
    • http://www.masozilina.sk/ckfinder/userfiles/files/47808665031.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/65556797841.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1614bbb47880ab---kozirogobepese.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/9737b725c4f13d88ec7cbfe1baf91509/nasumeduravawonu.pdfIn PDF document text
    • http://unesco-mediain.cz/fckfiles/file/99607780308.pdfIn PDF document text
    • http://autoklej.pl/app/webroot/media/files/30728362061.pdfIn PDF document text

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