Malicious PDF — malware analysis report

Static analysis result for SHA-256 536844f1ae0b8962…

MALICIOUS

PDF

36.7 KB Created: 2021-07-26 10:38:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: b65ec87359eafc9f1e48a12d5f42b135 SHA-1: ac939f3beb2bcf5738c971310b422e83cd08f4a4 SHA-256: 536844f1ae0b896220f09d18d1781c36a1daf7e15cb779cd2f27f93055426f6e
84 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. Heuristics indicate it's an image-only document with an action trigger, a common technique for phishing lures. The embedded URL, although marked as benign, is part of the phishing mechanism.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3316

Heuristics 4

  • 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.
  • 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://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=ejercicios+de+area+y+perimetro+de+figuras+geometricas+resueltos+pdf PDF link annotation