Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ab4c558eec433c5…

MALICIOUS

PDF

32.4 KB Created: 2020-01-17 19:20:51 +03:00 Authoring application: LaTeX with hyperref package (via XeTeX 0.99992)
MD5: fe4c24668fa409585e9a6213d3ea6914 SHA-1: 75b291164bdad40528fa4d56127d1ffa29fdf374 SHA-256: 5ab4c558eec433c5c8aed7ffa7f5991396798876321159f73b5b1f074d41856a
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF contains a large number of embedded external links, identified as a PDF link farm. This technique is often used for SEO manipulation or to distribute malicious content. The ML classifier also flagged the document as malicious. No scripts were extracted, and the document body was heavily obfuscated, preventing a deeper analysis of its specific intent beyond link distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8529

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/winslow-homer-artists-through-the-ages.pdf
    • http://www.gorillawalker.com/food-drying-techniques-storey-s-country-wisdom-bulletin-a-197.pdf
    • http://www.gorillawalker.com/the-sorrows-of-belgium-liberation-and-political-reconstruction-1944-1947.pdf
    • http://www.gorillawalker.com/aquinas-summa-theologiae-reader-s-guides.pdf
    • http://www.gorillawalker.com/going-solo-single-mothers-by-choice.pdf
    • http://www.gorillawalker.com/basic-brown-my-life-and-our-times.pdf
    • http://www.gorillawalker.com/china-children-and-teenagers-growth-must-read-animal-encyclopedia.pdf
    • http://www.gorillawalker.com/eco-imagination-african-and-diasporan-literatures-and-sustainability.pdf
    • http://www.gorillawalker.com/play-me-the-complete-story-play-me-wild-play-me.pdf
    • http://www.gorillawalker.com/the-world-is-what-it-is-the-authorized-biography-of.pdf
    • http://www.gorillawalker.com/iec-60130-16-ed-1-0-b-1976-connectors-for.pdf
    • http://www.gorillawalker.com/paper-pilot-activity-fun-packs.pdf
    • http://www.gorillawalker.com/a-gold-rush-voyage-on-the-bark-orion-from-boston.pdf
    • http://www.gorillawalker.com/my-fairy-tale-kindle-edition.pdf
    • http://www.gorillawalker.com/a-theory-of-scattering-for-quasifree-particles.pdf
    • http://www.gorillawalker.com/high-court-case-summaries-on-commercial-law-keyed-to-whaley.pdf
    • http://www.gorillawalker.com/contemporary-s-complete-pre-ged.pdf
    • http://www.gorillawalker.com/introduction-to-the-theory-and-design-of-sonar-transducers.pdf
    • http://www.gorillawalker.com/how-to-draw-alaska-s-sights-and-symbols-a-kid.pdf
    • http://www.gorillawalker.com/quantum-tangle-targon-tales-sethran-volume-1.pdf
    • http://www.gorillawalker.com/the-numbers-game-why-everything-you-know-about-football-is.pdf
    • http://www.gorillawalker.com/famine-and-foreigners-ethiopia-since-live-aid-hardback-common.pdf
    • http://www.gorillawalker.com/the-millionaire-bible-kindle-edition.pdf
    • http://www.gorillawalker.com/sanctuary-1-800-where-r-you.pdf
    • http://www.gorillawalker.com/the-pocket-doctor-your-guide-to-good-health-while-travelling.pdf
    • http://www.gorillawalker.com/the-code-of-the-holy-spirit-uncovering-the-hebraic-roots.pdf
    • http://www.gorillawalker.com/financial-and-managerial-accounting-depaul-university.pdf
    • http://www.gorillawalker.com/presenting-the-evidence-foundations-for-evidence-trial-practice.pdf
    • http://www.gorillawalker.com/u-s-government-rea-s-quick-access-reference-chart-quick.pdf
    • http://www.gorillawalker.com/the-cow-that-went-oink.pdf
    • http://www.gorillawalker.com/selling-your-art-a-comprehensive-guide-for-the-artist-determined.pdf
    • http://www.gorillawalker.com/the-measurement-of-time-time-frequency-and-the-atomic-clock.pdf
    • http://www.gorillawalker.com/american-sailing-ships-their-plans-and-history-dover-maritime.pdf
    • http://www.gorillawalker.com/the-power-meter-handbook-a-user-s-guide-for-cyclists.pdf
    • http://www.gorillawalker.com/the-hidden-psychology-of-pain-the-use-of-understanding-to.pdf
    • http://www.gorillawalker.com/jesus-the-demon-world.pdf
    • http://www.gorillawalker.com/gunning-for-the-finish-a-kurt-maxxon-mystery.pdf
    • http://www.gorillawalker.com/the-ultimate-marketing-plan-3th-third-edition-text-only.pdf
    • http://www.gorillawalker.com/by-norman-robillard-ibs-irritable-bowel-syndrome-fast-tract-digestion.pdf
    • http://www.gorillawalker.com/hayek-s-modern-family-classical-liberalism-and-the-evolution-of.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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