Malicious PDF — malware analysis report

Static analysis result for SHA-256 a981bb5be0f910f6…

MALICIOUS

PDF

40.6 KB Created: 2018-11-30 20:35:14 +03:00 Authoring application: - (via Acrobat Distiller 5.0.5 (Windows))
MD5: e5348aed8d8e9f4532b501ed18f30969 SHA-1: fb921b8be74d6cd529b680ffd4abe3c566e45f24 SHA-256: a981bb5be0f910f6a46b328f2c719ab4deb3f7ac111331bd46d5e3b1473e26b4
90 Risk Score

Malware Insights

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

The PDF was flagged for containing a large number of external links, specifically 32, pointing to PDF files on the domain www.gorillawalker.com. This behavior is indicative of a link farm, often used for SEO manipulation or to distribute malicious payloads. The ML classifier also strongly indicated maliciousness. No scripts were extracted from this sample.

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/francesco-albertini-memorial-of-many-statues-and-paintings-in-the.pdf
    • http://www.gorillawalker.com/isle-of-man-os-landranger-active-map.pdf
    • http://www.gorillawalker.com/locker-room-liaison-victorian-bondage-menage-victorian-values-book-1.pdf
    • http://www.gorillawalker.com/justified-piano-vocal-chords.pdf
    • http://www.gorillawalker.com/prophecy-and-the-biblical-prophets-oxford-bible-series.pdf
    • http://www.gorillawalker.com/counselor-a-life-at-the-edge-of-history.pdf
    • http://www.gorillawalker.com/acting-in-film-an-actor-s-take-on-movie-making.pdf
    • http://www.gorillawalker.com/neoliberalism-and-education-reform-critical-education-and-ethics.pdf
    • http://www.gorillawalker.com/cavalier-capital-oxford-in-the-english-civil-war-1642-1646.pdf
    • http://www.gorillawalker.com/the-tao-te-ching-element-classics-of-world-spirituality.pdf
    • http://www.gorillawalker.com/so-was-alaska.pdf
    • http://www.gorillawalker.com/uranus-library-of-the-planets.pdf
    • http://www.gorillawalker.com/the-frontal-lobes-and-voluntary-action-oxford-psychology-series.pdf
    • http://www.gorillawalker.com/ford-mustang-fast-cars.pdf
    • http://www.gorillawalker.com/hannibal-kindle-edition.pdf
    • http://www.gorillawalker.com/anacr-on-overture-bassoon-1-part-qty-3-a1199.pdf
    • http://www.gorillawalker.com/20-000-leagues-under-the-sea.pdf
    • http://www.gorillawalker.com/city-map-of-cesme-turkey.pdf
    • http://www.gorillawalker.com/salvaje-spanish-edition.pdf
    • http://www.gorillawalker.com/bedouin-of-the-london-evening-collected-poems.pdf
    • http://www.gorillawalker.com/brief-review-in-physics-2003-the-physical-setting.pdf
    • http://www.gorillawalker.com/coast-of-new-england-2015-square-12x12.pdf
    • http://www.gorillawalker.com/5s-for-operators-a-leader-s-shopfloor.pdf
    • http://www.gorillawalker.com/understanding-hospitality-law-with-answer-sheet-ahlei-5th-edition-ahlei.pdf
    • http://www.gorillawalker.com/health-and-medicine-in-the-jewish-tradition-l-hayyim-to.pdf
    • http://www.gorillawalker.com/the-book-of-topiary-classic-reprint.pdf
    • http://www.gorillawalker.com/awesome-memes-7-some-cute-babies-in-this-ebook.pdf
    • http://www.gorillawalker.com/10-keys-to-corporate-and-personal-success.pdf
    • http://www.gorillawalker.com/development-writing-assessment-grade-4-teacher-resource-book-2002c-developing.pdf
    • http://www.gorillawalker.com/a-modern-guide-to-demons-and-fallen-angels.pdf
    • http://www.gorillawalker.com/power-and-global-sport-zones-of-prestige-emulation-and-resistance.pdf
    • http://www.gorillawalker.com/the-science-of-getting-rich-large-print.pdf
    • http://www.gorillawalker.com/how-might-life-evolve-on-other-worlds-life-in-the.pdf
    • http://www.gorillawalker.com/programaci-n-lineal-aplicada-spanish-edition.pdf
    • http://www.gorillawalker.com/elaboracion-casera-de-cerveza-spanish-edition.pdf
    • http://www.gorillawalker.com/it-s-your-boat-too-a-woman-s-guide-to.pdf
    • http://www.gorillawalker.com/the-clause.pdf
    • http://www.gorillawalker.com/peripheral-vascular-interventions-an-illustrated-manual.pdf
    • http://www.gorillawalker.com/barron-s-correction-officer-exam-4th-edition.pdf
    • http://www.gorillawalker.com/el-restaurante-del-fin-del-mundo-spanish-edition.pdf
    • http://www.gorillawalker.com/acting-in-film-an-actor-s-take-on-movie-making
    • 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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