Malicious PDF — malware analysis report

Static analysis result for SHA-256 b662c5b07d31f120…

MALICIOUS

PDF

46.2 KB Created: 2021-02-24 16:56:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 450a2feb0545716c13f20a0c234c61ca SHA-1: fed59010ebb72541ce636aad17ffb306846d14d7 SHA-256: b662c5b07d31f1205a41d85dc62d50271a7d7b35a54d49f15feabe67de0f4399
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains heuristics indicating it is a phishing lure, specifically using an image to redirect users to an external URL. The embedded URL, https://jottigo.ru/award?keyword=what+is+reinforcement+concrete+density, is flagged as suspicious. While no scripts were extracted, the overall structure and detection by ClamAV as 'Pdf.Phishing.Trojan' strongly suggest a malicious intent to deceive the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5574

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 lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jottigo.ru/award?keyword=what+is+reinforcement+concrete+density PDF link annotation

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