Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b3c870e64a4ccce…

MALICIOUS

PDF

41.4 KB Created: 2018-11-26 20:05:59 +03:00 Authoring application: God (via Robotic Despoiler 1.0 for Windoze)
MD5: 931cd0c5272da65d1b8000118a986853 SHA-1: 81e300807f501ff51ed6178c4393eeaf660e4fe3 SHA-256: 8b3c870e64a4ccce05e2b0f54d6d8e6f19cb62ea6661b3bf9e74f314e159f997
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links to external PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this document as malicious with high confidence. The document body is heavily obfuscated, but the embedded URLs are clearly visible and appear to be the primary mechanism for the attack. The intent is likely to drive traffic to a link farm, potentially for SEO manipulation or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9181

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/history-of-professional-basketball.pdf
    • http://www.gorillawalker.com/chapters-in-probability-texts-in-mathematics.pdf
    • http://www.gorillawalker.com/the-political-economy-of-u-s-import-policy.pdf
    • http://www.gorillawalker.com/the-law-of-lawyering.pdf
    • http://www.gorillawalker.com/tarascon-palliative-medicine-pocketbook.pdf
    • http://www.gorillawalker.com/sport-and-public-policy-social-political-and-economic-perspectives.pdf
    • http://www.gorillawalker.com/the-really-useful-elementary-science-book.pdf
    • http://www.gorillawalker.com/american-popular-music-from-minstrelsy-to-mp3.pdf
    • http://www.gorillawalker.com/domo-snowboarding-ornament.pdf
    • http://www.gorillawalker.com/little-book-of-marmite-tips-little-books-of-tips-by.pdf
    • http://www.gorillawalker.com/the-ecumenical-legacy-of-the-cappadocians-pathways-for-ecumenical-and.pdf
    • http://www.gorillawalker.com/chasing-dreamtime-a-sea-going-hitchhiker-s-journey-through-memory.pdf
    • http://www.gorillawalker.com/lost-laker-lamented-they-still-ring-the-bell-at-detroit.pdf
    • http://www.gorillawalker.com/skin-aging-and-photoaging-physiology-clinical-aspects-and-emerging-therapies.pdf
    • http://www.gorillawalker.com/polymers-a-property-database-second-edition.pdf
    • http://www.gorillawalker.com/100-neo-futurist-plays-from-too-much-light-makes-the.pdf
    • http://www.gorillawalker.com/outlaw-lover.pdf
    • http://www.gorillawalker.com/rick-steves-snapshot-copenhagen-the-best-of-denmark.pdf
    • http://www.gorillawalker.com/conceptual-foundations-of-antitrust.pdf
    • http://www.gorillawalker.com/the-essential-goa-cookbook.pdf
    • http://www.gorillawalker.com/the-pianist.pdf
    • http://www.gorillawalker.com/satanas-mis-promesas-no-son-tuyas-la-guia-de-guerra.pdf
    • http://www.gorillawalker.com/gypsy-witch-fortune-telling-playing-cards.pdf
    • http://www.gorillawalker.com/the-mountains-of-oregon-by-w-g-steel.pdf
    • http://www.gorillawalker.com/the-iron-road-the-illustrated-history-of-railway-kindle-edition.pdf
    • http://www.gorillawalker.com/as-you-wish-christy-and-todd-the-college-years-2.pdf
    • http://www.gorillawalker.com/welcome-to-pakistan-welcome-to-my-country.pdf
    • http://www.gorillawalker.com/jury-the-people-vs-juan-corona.pdf
    • http://www.gorillawalker.com/the-future-of-nato-council-special-report.pdf
    • http://www.gorillawalker.com/la-kermesse-heroique-du-cinema-belge-collection-champs-visuels-french.pdf
    • http://www.gorillawalker.com/electrical-theory-for-renewable-energy-go-green-with-renewable-energy.pdf
    • http://www.gorillawalker.com/closed-captioning-subtitling-stenography-and-the-digital-convergence-of-text.pdf
    • http://www.gorillawalker.com/cpcu-core-review-500-foundations-of-risk-management-and-insurance.pdf
    • http://www.gorillawalker.com/advances-in-chemical-physics-electron-transfer-from-isolated-molecules-to.pdf
    • http://www.gorillawalker.com/101-nature-experiments-a-step-by-step-guide.pdf
    • http://www.gorillawalker.com/stock-detective-investor-finding-market-gems-online-kindle-edition.pdf
    • http://www.gorillawalker.com/nicholas-kaldor-great-thinkers-in-economics.pdf
    • http://www.gorillawalker.com/mystico-the-golden-age-volume-ii.pdf
    • http://www.gorillawalker.com/the-challenge-of-youth-employment-in-sri-lanka-directions-in.pdf
    • http://www.gorillawalker.com/bridges-picture-book-of-famous-bridges-kindle-edition.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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