Malicious PDF — malware analysis report

Static analysis result for SHA-256 b210cfe7f2c63898…

MALICIOUS

PDF

35.9 KB Created: 2021-06-15 18:02:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 71f8a77c8db21f35b9f18764a1b1e5a6 SHA-1: 4abe514c46bddea8a6a7c20f51fe8b9bca902ff5 SHA-256: b210cfe7f2c638985138951a8c64833e3e6d1a78bebdb002eda68820353100c8
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 exhibits characteristics of a phishing lure, being image-only with a clickable action directing to an external URL. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6203

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 https://wastran.ru/uplcv?utm_term=fastest+way+to+get+void+traces PDF link annotation
    • http://abimobiliare.pl/pliki/File/25492191042.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/bd623becbc22ba4d93a8adba377e5ed7/23541529660.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uIn PDF document text

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