Malicious PDF — malware analysis report

Static analysis result for SHA-256 c197e835058cf942…

MALICIOUS

PDF

45.8 KB Created: 2018-12-07 18:28:16 +03:00 Authoring application: LaTeX with hyperref package (via XeTeX 0.99992)
MD5: 32a060a9b74af1d3d6ebf11a897a6870 SHA-1: a2ddb2d3c48843d6986861db64e5f6f5a6999500 SHA-256: c197e835058cf942ab8953473dde89148eb0c704a17d143695ab9536f8e053be
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links to external PDF files, all hosted on the same domain. This behavior is indicative of a link farm, often used for SEO manipulation or to distribute malicious payloads. The ML classifier also flagged this PDF as malicious with a high probability. No scripts were extracted, and the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8600

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/normandy-insight-guide-insight-guides.pdf
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    • http://www.gorillawalker.com/c-m-wielands-s-mmtliche-werke-german-edition.pdf
    • http://www.gorillawalker.com/insights-how-expert-principals-make-difficult-decisions.pdf
    • http://www.gorillawalker.com/history-of-the-eighth-regiment-vermont-volunteers-1861-1865.pdf
    • http://www.gorillawalker.com/dreamfisher-the-fantasy-world-of-nancy-springer-kindle-edition.pdf
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    • http://www.gorillawalker.com/the-rash-adventurer-a-life-of-john-pendlebury.pdf
    • http://www.gorillawalker.com/an-incident-at-krechetovka-station-matryona-s-house-we-never.pdf
    • http://www.gorillawalker.com/books-initially-art-acrylic-painting-essentials-paperback.pdf
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    • http://www.gorillawalker.com/the-home-satellite-tv-installation-and-troubleshooting-manual-1986.pdf
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    • http://www.gorillawalker.com/national-geographic-angry-birds-furious-forces.pdf
    • http://www.gorillawalker.com/the-penguin-history-of-latin-america.pdf
    • http://www.gorillawalker.com/iran-s-military-forces-in-transition-conventional-threats-and-weapons.pdf
    • http://www.gorillawalker.com/the-beauty-of-being-a-woman-a-body-of-poems.pdf
    • http://www.gorillawalker.com/the-science-of-psychology-modules-2nd-edition.pdf
    • http://www.gorillawalker.com/standard-easter-program-book-contains-material-for-mother-s-day.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/