Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e41a2ec983fdaf9…

MALICIOUS

PDF

38.7 KB Created: 2019-02-13 22:35:46 +03:00 Authoring application: Microsoft Word: LaserWriter 8 8.6.5 (via Acrobat Distiller 4.0 for Macintosh)
MD5: b40d85c0567aa100afb000f84ff3c8b3 SHA-1: 6177ecc5387b8309db7df07422246495f94398e3 SHA-256: 7e41a2ec983fdaf946b5d9b6888a3a765806794a37631f5693fbe6eae72d6831
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a critical heuristic for containing a mass external PDF link farm, with 32 links pointing to various book titles hosted on gorillawalker.com. While no scripts were extracted, the sheer volume of links suggests an attempt to manipulate search engine rankings or drive traffic to potentially malicious or low-quality content. The ML classifier also indicated a high probability of maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8901

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/the-shake-down-diet-kindle-edition.pdf
    • http://www.gorillawalker.com/catamount-trail-guidebook.pdf
    • http://www.gorillawalker.com/half-resurrection-blues-a-bone-street-rumba-novel.pdf
    • http://www.gorillawalker.com/esoteria-land.pdf
    • http://www.gorillawalker.com/scales-and-chords-are-fun-bk-1-major-hirschberg-fun.pdf
    • http://www.gorillawalker.com/bones-never-lie-with-bonus-novella-swamp-bones-a-novel.pdf
    • http://www.gorillawalker.com/engen-afrikatourism-guide-a-guide-for-environment-oriented-travel-in.pdf
    • http://www.gorillawalker.com/a-way-of-being-free.pdf
    • http://www.gorillawalker.com/the-super-bowl-the-watts-history-of-sports.pdf
    • http://www.gorillawalker.com/mapping-the-moving-image-gesture-thought-and-cinema-circa-1900.pdf
    • http://www.gorillawalker.com/problems-in-thermodynamics-and-steam-power-plant-engineering.pdf
    • http://www.gorillawalker.com/greenpeace-international-organizations.pdf
    • http://www.gorillawalker.com/chef-daniel-boulud-cooking-in-new-york-city.pdf
    • http://www.gorillawalker.com/breakfast-with-jesus-john-21-1-14-little-deer-books.pdf
    • http://www.gorillawalker.com/purcell-fairy-queen-study-score-edition-eulenburg.pdf
    • http://www.gorillawalker.com/plasma-polymerization-processes-plasma-technology.pdf
    • http://www.gorillawalker.com/the-art-of-intelligence-simulations-exercises-and-games-security-and.pdf
    • http://www.gorillawalker.com/iridologia-diagnostico-por-el-iris-el-spanish-edition.pdf
    • http://www.gorillawalker.com/career-match-connecting-who-you-are-with-what-you-ll.pdf
    • http://www.gorillawalker.com/scholastic-success-with-addition-subtraction-grade-1.pdf
    • http://www.gorillawalker.com/slaves-of-the-spider-queen-dark-elf-fantasies-book-2.pdf
    • http://www.gorillawalker.com/papua-new-guinea-an-entry-from-gale-s-worldmark-encyclopedia.pdf
    • http://www.gorillawalker.com/the-biology-of-euglena-physiology.pdf
    • http://www.gorillawalker.com/the-starter-marriage.pdf
    • http://www.gorillawalker.com/the-warmth-of-the-heart-prevents-your-body-from-rusting.pdf
    • http://www.gorillawalker.com/moon-flower.pdf
    • http://www.gorillawalker.com/naked-faith-the-mystical-theology-of-phoebe-palmer.pdf
    • http://www.gorillawalker.com/intimacy-change-and-other-therapeutic-mysteries-stories-of-clinicians-and.pdf
    • http://www.gorillawalker.com/harmony-house.pdf
    • http://www.gorillawalker.com/saint-in-the-slums-the-story-of-kagawa-of-japan.pdf
    • http://www.gorillawalker.com/racing-the-rain-a-novel.pdf
    • http://www.gorillawalker.com/harvard-business-review-on-crisis-management-paperback.pdf
    • http://www.gorillawalker.com/research-on-writing-approaches-in-mental-health-studies-in-writing.pdf
    • http://www.gorillawalker.com/toby-and-the-ice-giants.pdf
    • http://www.gorillawalker.com/under-the-sea-postcards.pdf
    • http://www.gorillawalker.com/blackjack-forum-vol-xv-4.pdf
    • http://www.gorillawalker.com/seven-arrows.pdf
    • http://www.gorillawalker.com/new-dream-interpreter.pdf
    • http://www.gorillawalker.com/science-foundations-chemistry-plus.pdf
    • http://www.gorillawalker.com/communities-crime-and-social-capital-in-contemporary-china.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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