Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7a4ea38d6e0d4c4…

MALICIOUS

PDF

67.6 KB Created: 2021-03-29 04:54:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 4fbe88abafa65c749907a63cdf709981 SHA-1: 288be03473c9396561179094e937313abb1bf3ad SHA-256: a7a4ea38d6e0d4c49782c8b3ca70702a07c2a91c79aa716fd4da9a046857cae3
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs pointing to external, potentially malicious sites, and is flagged as a link farm on disposable hosting. The presence of external URIs suggests an attempt to redirect the user to phishing or malware download pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9439

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://bologen.ru/strik?utm_term=corsair+cx750m+user+manual PDF link annotation
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