Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fd5cbdbcab67b38…

MALICIOUS

PDF

49.6 KB Created: 2020-12-23 09:56:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 2d87addcbc7dcbb731aebecf785ec2a5 SHA-1: 419934b27360d1c938105a5d1283c39fb0d43031 SHA-256: 1fd5cbdbcab67b38c13eae2896d2649d8cf273e124ddb607c028be05932c3333
134 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains a high-severity heuristic indicating it's an SEO redirector for phishing, using an image lure to direct users to the URL https://trafficel.ru/aws?utm_term=buy+aluminium+sheet+near+me. The document body is heavily obfuscated, but the presence of PDF-specific heuristics suggests an attempt to exploit PDF vulnerabilities or employ social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6121

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://trafficel.ru/aws?utm_term=buy+aluminium+sheet+near+me PDF link annotation

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