Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a254cba351b318b…

MALICIOUS

PDF

35.9 KB Created: 2021-06-28 23:37:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 403746e3db0567d41842d8f6deb9d137 SHA-1: 03f801373237b26d73c3c5a20d72f552353b1011 SHA-256: 4a254cba351b318b8f6ee6e3c5f4aa51b15d0ea2ac743b49e76c800b9fea207a
114 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-heavy nature and small file size, typical of a screenshot designed to hide a clickable link. The embedded URL points to a PDF hosted on a suspicious domain, likely serving as a second-stage payload. While no scripts were explicitly extracted, the ClamAV detection and ML classification strongly indicate malicious intent, likely involving a phishing or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7601

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/blot1q2j7gp6ohor64eatlb384/mezigubiwekowatidajex.pdf In PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=aspirated+and+unaspirated+sounds+in+englishPDF link annotation

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