Malicious PDF — malware analysis report

Static analysis result for SHA-256 b964cac3943155e9…

MALICIOUS

PDF

35.3 KB Created: 2021-03-17 20:42:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d91dd5bd64357016809dbded13f1be52 SHA-1: 1dc8ca6b6f65219dc26cc54c136a149ff18f37a9 SHA-256: b964cac3943155e990c701876c70e8a94951dc32556f2a4aa5f701b71456d7cc
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a single image designed to look like a document, a common phishing lure. It also contains a critical heuristic firing for a malicious redirector link, which points to the URL https://yafferge.ru/award?keyword=functional+group+interconversion+organic+synthesis+pdf. This URL is the primary indicator of compromise, suggesting the document's purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8187

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=functional+group+interconversion+organic+synthesis+pdf

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