Malicious PDF — malware analysis report

Static analysis result for SHA-256 d221a29bb4a93d6f…

MALICIOUS

PDF

52.6 KB Created: 2021-02-18 03:52:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 8b1958605498c9f8955a5ac4ecb1eda7 SHA-1: dcd136eb184a10cce0b7f0cdac789ec96ed7ecce SHA-256: d221a29bb4a93d6f9047b39b6d9b783701a91d58d09e36df05385147b0bba03e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains an embedded URI and a high-severity heuristic indicating it's an SEO redirector link, likely for phishing or malware distribution. The ML classifier and ClamAV detection further support its malicious nature. Although no scripts were extracted, the presence of a redirector URL suggests an attempt to lure the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6121

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/aws?utm_term=echo+cs+590+muffler+mod PDF link annotation

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