Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4738a6467c18082…

MALICIOUS

PDF

36.2 KB Created: 2021-09-04 10:32:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8dd0937999bf4faa38fbed3c2b7160f1 SHA-1: 68c5c6c9fb5a30ea9e34b7a6088c0000418964c7 SHA-256: b4738a6467c180824bf77a0dc4ffcfe88b9b87dd7cbc79e58a81a4f67cad751b
114 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was identified as an image-only lure, a common technique for phishing or malware distribution. It contains multiple embedded URLs, one of which is https://coretry.ru/uplcv?utm_term=uud+1945+dan+amandemen+pdf, likely serving as the primary malicious destination. The ML classifier and ClamAV detection further support its malicious nature, indicating it's a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7086

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://coretry.ru/uplcv?utm_term=uud+1945+dan+amandemen+pdf PDF link annotation
    • https://seeandhearbetter.ie/img/shop//contents/dimazobikupuni.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b26ff96f5b---xafag.pdfIn PDF document text
    • http://embeddedhr.com/ckfinder/userfiles/files/jonadobasotalolalalo.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a32c5b9097a---kabura.pdfIn PDF document text

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