Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f89409be5005c20…

MALICIOUS

PDF

35.9 KB Created: 2021-07-01 14:51:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: ff4386621144b868ccf9e2b3f5239f18 SHA-1: 202e21b5d5bd2b3a47dab56fc0220286a1acf38b SHA-256: 1f89409be5005c20c9172004917ebd09d31cac3ac11c200e593481c965e146bc
114 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as malicious by ClamAV and an ML classifier. It employs an image-only lure, a common tactic for phishing or malware distribution. The embedded URL, https://irlanc.ru/uplcv?utm_term=example+of+application+letter+for+scholarship, is the primary indicator of the malicious intent, likely serving as a redirect to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7874

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 35 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://irlanc.ru/uplcv?utm_term=example+of+application+letter+for+scholarship PDF link annotation
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/72f17b55b001a3af4585f684c3419500/91385015339.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071ba9cdb94c---92691840723.pdfIn PDF document text

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