Malicious PDF — malware analysis report

Static analysis result for SHA-256 58de956319dd5c87…

MALICIOUS

PDF

36.6 KB Created: 2021-09-23 21:03:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: c4821dffe989d34c263ae6c2bc2c734b SHA-1: baa3ce218086dd9eb828fb3af5d4f94cca04f8f0 SHA-256: 58de956319dd5c879213368d535d97fef7c23aab62e8dda2693fe300716e37fd
114 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size and image-heavy content, typical of a screenshot designed to hide clickable elements. The embedded URL `https://ketchas.ru/uplcv?utm_term=take+pdf+picture+with+android` strongly suggests a phishing or malicious download attempt. ClamAV and ML classifiers also flagged this file as malicious, reinforcing the phishing and potential trojan delivery assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7134

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 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://ketchas.ru/uplcv?utm_term=take+pdf+picture+with+android PDF link annotation
    • http://strelnicebudejovice.cz/userfiles/file/70726896009.pdfIn PDF document text
    • http://theponghop.com/upload/files/12431953557.pdfIn PDF document text
    • http://kxqcgs.com/filespath/files/20210921100658.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/mifem.pdfIn PDF document text
    • https://artesapanaderia.xyz/aym_image/files/30270008341.pdfIn PDF document text

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