Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d3bdbef127ca36f…

MALICIOUS

PDF

40.1 KB Created: 2018-11-30 20:23:49 +03:00 Authoring application: DocBook XSL Stylesheets with Apache FOP (via Apache FOP Version 1.1)
MD5: eaa45d14a327b886738dfbfe629f5f2f SHA-1: 2511fb902f258aabde4411262ccd39e6c642da17 SHA-256: 3d3bdbef127ca36fb81592baa7b7b216e93b3134d37cee418cca9d39b6d91cf9
90 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for containing a mass external PDF link farm, with 32 links pointing to www.gorillawalker.com. The ML classifier also strongly indicated maliciousness. The document body contains numerous URLs, all pointing to PDFs hosted on www.gorillawalker.com, suggesting a coordinated effort to drive traffic to these resources. The primary attack pattern appears to be SEO manipulation or a lure to a site hosting potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8872

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/christianity-eyewitness-books.pdf
    • http://www.gorillawalker.com/looseleaf-for-the-humanistic-tradition-book-4-faith-reason-and.pdf
    • http://www.gorillawalker.com/mind-over-matters-kindle-edition.pdf
    • http://www.gorillawalker.com/humanity-an-emotional-history.pdf
    • http://www.gorillawalker.com/john-pawson-works.pdf
    • http://www.gorillawalker.com/the-new-hypnotherapy-handbook-hypnosis-and-mind-body-healing.pdf
    • http://www.gorillawalker.com/communication-arts-illustration-annual.pdf
    • http://www.gorillawalker.com/an-empirical-investigation-of-stock-markets-the-ccf-approach-research.pdf
    • http://www.gorillawalker.com/the-advantage-the-7-soft-skills-you-need-to-stay.pdf
    • http://www.gorillawalker.com/crc-handbook-of-comparative-opioid-and-related-neuropeptide-mechanisms-volume.pdf
    • http://www.gorillawalker.com/niv-standard-lesson-commentary-2010-2011.pdf
    • http://www.gorillawalker.com/101-kicking-and-punting-drills.pdf
    • http://www.gorillawalker.com/the-ultimate-guide-to-ladyboys-kindle-edition.pdf
    • http://www.gorillawalker.com/sap-sales-distribution-certification-guide.pdf
    • http://www.gorillawalker.com/pearl-harbor-1941.pdf
    • http://www.gorillawalker.com/college-costs-in-state-rise-across-the-board-overview-an.pdf
    • http://www.gorillawalker.com/learning-about-fiction-language-arts.pdf
    • http://www.gorillawalker.com/design-new-england-magazine-kitchen-bath-january-february-2012.pdf
    • http://www.gorillawalker.com/berlin-game-book-1-of-the-bernard-samson-game-set.pdf
    • http://www.gorillawalker.com/timeless-your-mind-body-and-spirit-guide-to-aging-with.pdf
    • http://www.gorillawalker.com/emma-and-sara-learn-about-harvest-time.pdf
    • http://www.gorillawalker.com/africa-on-the-move.pdf
    • http://www.gorillawalker.com/introduction-to-computational-mathematics.pdf
    • http://www.gorillawalker.com/afterimage-of-the-revolution-cumann-na-ngaedheal-and-irish-politics.pdf
    • http://www.gorillawalker.com/the-great-swindle.pdf
    • http://www.gorillawalker.com/the-unofficial-guide-to-las-vegas-1997-unofficial-guides.pdf
    • http://www.gorillawalker.com/human-growth-in-the-past-studies-from-bones-and-teeth.pdf
    • http://www.gorillawalker.com/the-liberated-imagination-thinking-christianly-about-the-arts.pdf
    • http://www.gorillawalker.com/advances-in-liquid-crystals-vol-1.pdf
    • http://www.gorillawalker.com/collins-spanish-school-dictionary.pdf
    • http://www.gorillawalker.com/the-writer-on-her-work-volume-i.pdf
    • http://www.gorillawalker.com/the-land-that-time-forgot-large-print-edition-caspak-trilogy.pdf
    • http://www.gorillawalker.com/biomedical-informatics-discovering-knowledge-in-big-data.pdf
    • http://www.gorillawalker.com/the-wahls-protocol-a-radical-new-way-to-treat-all.pdf
    • http://www.gorillawalker.com/catalogue-of-irish-manuscripts-in-king-s-inns-library-dublin.pdf
    • http://www.gorillawalker.com/thicker-than-water-blood-brothers-vampire-series-book-1-kindle.pdf
    • http://www.gorillawalker.com/pirates-at-heart.pdf
    • http://www.gorillawalker.com/as-if-modern-enchantment-and-the-literary-prehistory-of-virtual.pdf
    • http://www.gorillawalker.com/betrayal-the-two-moons-of-rehnor-book-14.pdf
    • http://www.gorillawalker.com/the-making-of-urban-japan-cities-and-planning-from-edo.pdf
    • http://www.gorillawalker.com/an-empirical-investigation-of
    • 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/