Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4937f573e762170…

MALICIOUS

PDF

43.5 KB Created: 2018-12-02 21:04:55 +03:00 Authoring application: Adobe InDesign CC (Macintosh) (via Adobe PDF Library 11.0)
MD5: 4a40560143d200c5e995855f96646f6e SHA-1: 36ee317953ea214234162aecd714cfb0aa4b03c5 SHA-256: a4937f573e762170a9ccdf13074d3b3ae69492d55cc28850466d0468d0a0b743
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF was flagged by a machine learning classifier and contains a large number of external links, indicating a link farm. The primary heuristic identified a "PDF_SEO_LINK_FARM" with the first URL being http://www.gorillawalker.com/a-journey-through-literary-america.pdf. This suggests the document is designed to drive traffic to a website hosting numerous other PDF files, likely for SEO manipulation or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8439

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/a-journey-through-literary-america.pdf
    • http://www.gorillawalker.com/av-market-place.pdf
    • http://www.gorillawalker.com/forever-french-exile-in-the-united-states-1939-1945-french.pdf
    • http://www.gorillawalker.com/frontier-forts-of-texas.pdf
    • http://www.gorillawalker.com/discipline-of-grace-god-s-role-and-our-role-in.pdf
    • http://www.gorillawalker.com/braquiosaurio-brachiosaurus-dinosaurios-y-animales-prehist-ricos-dinosaurs-and-prehistoric.pdf
    • http://www.gorillawalker.com/indispensable-party-sasha-mccandless-legal-thriller-book-4-unabridged-audible.pdf
    • http://www.gorillawalker.com/voices-under-berlin-the-tale-of-a-monterey-mary.pdf
    • http://www.gorillawalker.com/chariots-of-the-gods-unsolved-mysteries-of-the-past.pdf
    • http://www.gorillawalker.com/totally-tuber.pdf
    • http://www.gorillawalker.com/mouse-behavioral-testing-how-to-use-mice-in-behavioral-neuroscience.pdf
    • http://www.gorillawalker.com/cancer-in-context-a-practical-guide-to-supportive-care-oxford.pdf
    • http://www.gorillawalker.com/telemicrosurgery-robot-assisted-microsurgery.pdf
    • http://www.gorillawalker.com/cosmetic-surgeon-marketing-motto-the-secret-recipe-to-grow-referrals.pdf
    • http://www.gorillawalker.com/the-empire-of-the-st-lawrence-a-study-in-commerce.pdf
    • http://www.gorillawalker.com/the-fine-art-of-mixing-drinks-1958-revised-edition.pdf
    • http://www.gorillawalker.com/iec-60068-3-3-ed-1-0-b-1991-environmental.pdf
    • http://www.gorillawalker.com/particle-physics-an-introduction.pdf
    • http://www.gorillawalker.com/the-vietnam-war-in-american-stories-songs-and-poems.pdf
    • http://www.gorillawalker.com/belgium-and-western-germany-in-1833-including-visits-to-baden.pdf
    • http://www.gorillawalker.com/the-unofficial-must-have-guide-to-navigate-walt-disney-world.pdf
    • http://www.gorillawalker.com/jazz-styles-11th-edition.pdf
    • http://www.gorillawalker.com/heat-wave-volume-two-alpha-billionaire-romance.pdf
    • http://www.gorillawalker.com/building-problem-solvers-artificial-intelligence.pdf
    • http://www.gorillawalker.com/whole-parent-whole-child-a-parents-guide-to-raising-a.pdf
    • http://www.gorillawalker.com/kin-selection-in-the-japanese-monkey-contributions-to-primatology.pdf
    • http://www.gorillawalker.com/gongs-bamboo-a-panorama-of-philippine-music-instruments.pdf
    • http://www.gorillawalker.com/holt-science-technology-chapter-20-resource-file-formation-of-the.pdf
    • http://www.gorillawalker.com/children-s-britannica.pdf
    • http://www.gorillawalker.com/hamp.pdf
    • http://www.gorillawalker.com/05-05-2015-russia-stocks-buy-sell-hold-ratings-buy.pdf
    • http://www.gorillawalker.com/manual-of-intensive-care-medicine-with-annotated-key-references-lippincott.pdf
    • http://www.gorillawalker.com/andi-s-fair-surprise-circle-c-beginnings.pdf
    • http://www.gorillawalker.com/invasive-aquatic-and-wetland-animals-invasive-species.pdf
    • http://www.gorillawalker.com/angel-cup-vol-2.pdf
    • http://www.gorillawalker.com/el-hidr.pdf
    • http://www.gorillawalker.com/the-british-motorcycle-story-by-colin-jackson-published-by-the.pdf
    • http://www.gorillawalker.com/merchants-and-traders-the-latinum-main-star-trek-deep-space.pdf
    • http://www.gorillawalker.com/tiempos-de-hielo-nuevos-tiempos-spanish-edition.pdf
    • http://www.gorillawalker.com/a-basic-bibliography-of-books-in-spanish-for-business-and.pdf
    • http://www.gorillawalker.com/chariot
    • 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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