Malicious PDF — malware analysis report

Static analysis result for SHA-256 746ea3cc41f59e65…

MALICIOUS

PDF

32.7 KB Created: 2019-12-14 01:13:05 +03:00 Authoring application: Adobe InDesign CS5.5 (7.5.1) (via Adobe PDF Library 9.9)
MD5: 781b483316de7da070fc4564b80ae176 SHA-1: 1b13d4d50bc78bdfd96615edc2642ecbc7f65cde SHA-256: 746ea3cc41f59e65d3b662f0d3773b73a524273fb4418d74acc8b34c5c893b86
112 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. While no scripts were explicitly extracted, the ML classifier flagged the PDF as malicious, and the presence of numerous links suggests an attempt to manipulate search engine rankings or distribute potentially malicious content. The SE_CALLBACK_LURE heuristic indicates a potential phishing or scam pretext, though the primary observed behavior is the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8313

Heuristics 3

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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-colour-washes-how-to-paint.pdf
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    • http://www.gorillawalker.com/jineteras-spanish-edition.pdf
    • http://www.gorillawalker.com/exit-strategien-von-venture-capital-gesellschaften-german-edition.pdf
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    • http://www.gorillawalker.com/faculties-of-regular-confessors-1949.pdf
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    • http://www.gorillawalker.com/frenchie-new-bistro-cooking.pdf
    • http://www.gorillawalker.com/the-socio-economic-contribution-of-tourism-to-nigeria-and-north.pdf
    • http://www.gorillawalker.com/the-oxford-handbook-of-post-keynesian-economics-volume-2-critiques.pdf
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    • http://www.gorillawalker.com/no-wonder-they-call-it-the-real-presence-lives-changed.pdf
    • http://www.gorillawalker.com/through-the-static.pdf
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    • http://www.gorillawalker.com/northeast-india-handbook-travel-guide-to-northeast-india-footprint-handbooks.pdf
    • http://www.gorillawalker.com/thinking-class-sketches-from-a-cultural-worker.pdf
    • 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/

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