Malicious PDF — malware analysis report

Static analysis result for SHA-256 031cd6ef7c23f857…

MALICIOUS

PDF

33.0 KB Created: 2019-09-15 17:45:07 +03:00 Authoring application: XPP (via Adobe Acrobat Pro DC 15.23.20053)
MD5: 0c0d1fa81b3527a3416e3598f0846cda SHA-1: 0685fbcbbb723bd351a67f8cd266c41d1acafc1c SHA-256: 031cd6ef7c23f8573c20e9d81eb530705b9839e034b7bb97ae3448461d4f55c2
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links pointing to external PDF files, a technique often used for SEO manipulation or to distribute malicious content. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the sheer volume of links suggests an attempt to drive traffic or distribute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8313

Heuristics 2

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 http://www.gorillawalker.com/water-wave-propagation-over-uneven-bottoms-advanced-series-on-ocean.pdf
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    • http://www.gorillawalker.com/code-of-federal-regulations-title-19-customs-duties-pt-200.pdf
    • http://www.gorillawalker.com/creator-a-superhero-epic-2nd-edition.pdf
    • http://www.gorillawalker.com/alberto-ghiraldo-anarquismo-y-cultura-biblioteca-politica-argentina-spanish-edition.pdf
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    • http://www.gorillawalker.com/spring-peeps.pdf
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    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://www.aiim.org/pdfa/ns/extension/
    • http://www.aiim.org/pdfa/ns/schema#
    • http://www.aiim.org/pdfa/ns/property#
    • http://www.aiim.org/pdfa/ns/id/