Malicious PDF — malware analysis report

Static analysis result for SHA-256 7785a635b10d02ed…

MALICIOUS

PDF

58.0 KB Created: 2021-03-16 03:36:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 16246ef72c8e7a7b22117ce7360ec9f5 SHA-1: 6c76775786c9d4a405ef95097e288c2e3776b53c SHA-256: 7785a635b10d02ed394068423999ba1f3933df3052f382832470a0a9b7b5ea4d
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a search query, further supporting a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6619

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://zajinet.ru/strik?utm_term=what+do+water+fleas+look+like PDF link annotation
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    • http://rijupoxog.22web.org/11166851212.pdfIn PDF document text
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