Malicious PDF — malware analysis report

Static analysis result for SHA-256 2456c5683a9030b1…

MALICIOUS

PDF

76.3 KB Created: 2021-06-13 16:58:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 1e01100f4fea67bec307c8bd3b016302 SHA-1: 15646cbb4e0f84db98373a8502a24130bfd21da3 SHA-256: 2456c5683a9030b17b5ade7aa0e99dc6b4ef37ab4ee356ad1f78c728fd11ceff
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document identified as malicious by ClamAV and ML classifiers. It contains a high-severity heuristic indicating an image lure linking to an SEO redirector, which is a common phishing tactic. The embedded URL leads to a domain associated with phishing, suggesting the document's purpose is to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6915

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://inwebjor.ru/uplcv?utm_term=closed+circuit+symbol PDF link annotation

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