Malicious PDF — malware analysis report

Static analysis result for SHA-256 766bc0c38b072dbd…

MALICIOUS

PDF

43.6 KB Created: 2018-12-07 18:28:35 +03:00 Authoring application: LaTeX with hyperref package (via pdfTeX-1.40.9)
MD5: 58407e5a10680c9b581ec2b1da77c876 SHA-1: b8da9d07735caa62616503627d87b5fb1c26c5e4 SHA-256: 766bc0c38b072dbdffcced972a9a52fe39c698080add61dcec62439c326f553e
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files hosted on the domain 'gorillawalker.com'. This is indicative of a link farm or SEO manipulation tactic, and the ML classifier also flagged the document as malicious. The primary attack pattern observed is the distribution of numerous external links, potentially to distribute malware or engage in phishing. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9171

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/atlas-of-neuroanatomy-and-neurophysiology-special-edition.pdf
    • http://www.gorillawalker.com/branding-in-a-competitive-marketplace.pdf
    • http://www.gorillawalker.com/wayne-gretzky-the-making-of-the-great-one.pdf
    • http://www.gorillawalker.com/diary-of-a-stripper-kindle-edition.pdf
    • http://www.gorillawalker.com/program-planning-and-evaluation-for-the-public-manager.pdf
    • http://www.gorillawalker.com/hal-leonard-ukulele-aerobics-for-all-levels-from-beginner-to.pdf
    • http://www.gorillawalker.com/streamlined-process-improvement.pdf
    • http://www.gorillawalker.com/the-puzzle-of-parkinson-s-disease.pdf
    • http://www.gorillawalker.com/the-loomatic-s-interactive-guide-to-the-rainbow-loom.pdf
    • http://www.gorillawalker.com/jews-of-arab-lands-a-history-and-source-book.pdf
    • http://www.gorillawalker.com/leaves-from-a-journal-in-the-east-december-1899-november.pdf
    • http://www.gorillawalker.com/amok-fourth-dispatch-sourcebook-of-extremes-of-information-in-print.pdf
    • http://www.gorillawalker.com/envejecimiento-del-pavimento-asf-ltico-de-la-cin-tica-qu.pdf
    • http://www.gorillawalker.com/footfall.pdf
    • http://www.gorillawalker.com/rural-wage-employment-in-developing-countries-theory-evidence-and-policy.pdf
    • http://www.gorillawalker.com/angels-and-principalities-the-background-meaning-and-development-of-the.pdf
    • http://www.gorillawalker.com/the-quiet-one-general-roscoe-robinson-jr.pdf
    • http://www.gorillawalker.com/emblem-and-state-in-the-classic-maya-lowlands-an-epigraphic.pdf
    • http://www.gorillawalker.com/mcat-the-best-test-preparation-for-the-medical-college-admission.pdf
    • http://www.gorillawalker.com/the-arrows-of-time-orthogonal-book-three.pdf
    • http://www.gorillawalker.com/diccionario-espanol-arabe-spanish-edition.pdf
    • http://www.gorillawalker.com/david-busch-s-nikon-d3200-guide-to-digital-slr-photography.pdf
    • http://www.gorillawalker.com/a-dominant-fallen-a-dominant-series-volume-2.pdf
    • http://www.gorillawalker.com/ebay-co-uk-business-all-in-one-for-dummies.pdf
    • http://www.gorillawalker.com/water-treatment-publication-ifp.pdf
    • http://www.gorillawalker.com/national-geographic-traveler-miami-the-keys.pdf
    • http://www.gorillawalker.com/american-colonies-in-the-eighteenth-century-1689-1763.pdf
    • http://www.gorillawalker.com/putting-terrorism-in-context-lessons-from-the-global-terrorism-database.pdf
    • http://www.gorillawalker.com/olduvai-gorge-2-part-set-volume-4-the-skulls-endocasts.pdf
    • http://www.gorillawalker.com/my-happiness-project-11-lessons-from-cancer-my-thyroid-and.pdf
    • http://www.gorillawalker.com/stars-scientific-american-library-paperback.pdf
    • http://www.gorillawalker.com/changing-architectural-education-towards-a-new-professionalism.pdf
    • http://www.gorillawalker.com/plunkett-s-sports-industry-almanac-2009-sports-industry-market-research.pdf
    • http://www.gorillawalker.com/a-model-to-estimate-soil-changes-under-agriculture-agroforestry-and.pdf
    • http://www.gorillawalker.com/garden-rules-the-snappy-synopsis-for-the-modern-gardener.pdf
    • http://www.gorillawalker.com/pimsleur-danish-level-1-cd-learn-to-speak-and-understand.pdf
    • http://www.gorillawalker.com/edvard-munch-1863-1944-taschen-art-series.pdf
    • http://www.gorillawalker.com/the-diary-of-a-forty-niner.pdf
    • http://www.gorillawalker.com/the-sage-handbook-of-new-approaches-in-management-and-organization.pdf
    • http://www.gorillawalker.com/scene-design-stage-lighting-sound-costume-makeup.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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