Malicious PDF — malware analysis report

Static analysis result for SHA-256 7df40a509f35a00a…

MALICIOUS

PDF

48.6 KB Created: 2019-03-18 08:33:50 +03:00 Authoring application: - (via Python PDF Library - http://pybrary.net/pyPdf/) First seen: 2019-04-21
MD5: be32107e604c0c784a17569bd9c36cb6 SHA-1: 174835e5412f4faf2cb0370c2c212bc2b0740022 SHA-256: 7df40a509f35a00ada01f77e66b4718932c562dfa53d19f5f236bcf3785297d1
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by a critical heuristic for containing a mass external PDF link farm, pointing to 32 different URLs on gorillawalker.com. The ML classifier also indicated a high probability of maliciousness. While no scripts were extracted, the sheer volume of outbound links suggests an attempt to manipulate search engine rankings or distribute potentially malicious content via these linked PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8274

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/dental-material-of-resin-and-cement-and-clinical.pdf In PDF document text
    • http://www.gorillawalker.com/getting-over-kindle-edition.pdfIn PDF document text
    • http://www.gorillawalker.com/bending-adversity-japan-and-the-art-of-survival.pdfIn PDF document text
    • http://www.gorillawalker.com/mandala-coloring-book-meditation-healing-mandala-coloring-book-for-adults.pdfIn PDF document text
    • http://www.gorillawalker.com/i-spy-big-diggers-and-working-machines.pdfIn PDF document text
    • http://www.gorillawalker.com/genuine-authentic-the-real-life-of-ralph-lauren.pdfIn PDF document text
    • http://www.gorillawalker.com/the-2011-import-and-export-market-for-printed-books-pamphlets.pdfIn PDF document text
    • http://www.gorillawalker.com/dying-to-be-heard-kindle-edition.pdfIn PDF document text
    • http://www.gorillawalker.com/inside-canadian-intelligence-exposing-the-new-realities-of-espionage-and.pdfIn PDF document text
    • http://www.gorillawalker.com/bassoon-concerto-in-f-major-op-75-ue18131-edition-for.pdfIn PDF document text
    • http://www.gorillawalker.com/freedom-feminism-and-the-state-an-overview-of-individualist-feminism.pdfIn PDF document text
    • http://www.gorillawalker.com/tribal-invasion-and-kashmir-pakistani-attempts-to-capture-kashmir-in.pdfIn PDF document text
    • http://www.gorillawalker.com/palm-springs-living.pdfIn PDF document text
    • http://www.gorillawalker.com/high-blood-pressure-at-your-fingertips-gao-xue-ya-305.pdfIn PDF document text
    • http://www.gorillawalker.com/fundamental-chemical-kinetics-an-explanatory-introduction-to-the-concepts-horwood.pdfIn PDF document text
    • http://www.gorillawalker.com/italian-women-writers-1800-2000-boundaries-borders-and-transgression.pdfIn PDF document text
    • http://www.gorillawalker.com/primal-leadership-realizing-the-power-of-emotional-intelligence-abridged-audible.pdfIn PDF document text
    • http://www.gorillawalker.com/stealing-beauty-complete-collection.pdfIn PDF document text
    • http://www.gorillawalker.com/the-tap-dance-kid-vinyl-lp-the-broadway-cast-recording.pdfIn PDF document text
    • http://www.gorillawalker.com/the-very-least-of-me-poems-and-stories-with-reflections.pdfIn PDF document text
    • http://www.gorillawalker.com/the-house-garden-book-of-living-rooms.pdfIn PDF document text
    • http://www.gorillawalker.com/capital-punishment-current-controversies.pdfIn PDF document text
    • http://www.gorillawalker.com/mounted-and-bred-by-the-mermen-himeros-cycle-kindle-edition.pdfIn PDF document text
    • http://www.gorillawalker.com/justice-in-young-adult-speculative-fiction-a-cognitive-reading-children.pdfIn PDF document text
    • http://www.gorillawalker.com/the-perennial-philosophy.pdfIn PDF document text
    • http://www.gorillawalker.com/easy-anglo-1-2-3-a-beginner-s-guide-to.pdfIn PDF document text
    • http://www.gorillawalker.com/the-downfall-of-money-germany-s-hyperinflation-and-the-destruction.pdfIn PDF document text
    • http://www.gorillawalker.com/complete-works-vol-6-kalmus-edition.pdfIn PDF document text
    • http://www.gorillawalker.com/caught-in-the-act-taboo-fertile-first-time-menage.pdfIn PDF document text
    • http://www.gorillawalker.com/the-birds-of-turkey-helm-field-guides.pdfIn PDF document text
    • http://www.gorillawalker.com/mama-lolo-s-cookbook-for-digestive-health-no-more-constipation.pdfIn PDF document text
    • http://www.gorillawalker.com/searching-for-scientific-womanpower-technocratic-feminism-and-the-politics-of.pdfIn PDF document text
    • http://www.gorillawalker.com/california-rules-of-court-state-2006-california-rules-of-court.pdfIn PDF document text
    • http://www.gorillawalker.com/uso-de-la-gramatica-espanola-junior-nivel-avanzado-libro-del.pdfIn PDF document text
    • http://www.gorillawalker.com/willing-submission.pdfIn PDF document text
    • http://www.gorillawalker.com/guide-to-dna-testing-how-to-identify-ancestors-confirm-relationships.pdfIn PDF document text
    • http://www.gorillawalker.com/doll-tees-felt-fashions-design-and-decorate-tees-that-are.pdfIn PDF document text
    • http://www.gorillawalker.com/the-dead-circus.pdfIn PDF document text
    • http://www.gorillawalker.com/90-days-of-promoting-your-book-online-your-book-s.pdfIn PDF document text
    • http://www.gorillawalker.com/delmar-learning-s-clinical-medical-assisting-pocket-guide.pdfIn PDF document text
    • http://pybrary.net/pyPdf/In PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://www.aiim.org/pdfa/ns/extension/In PDF document text
    • http://www.aiim.org/pdfa/ns/schema#In PDF document text
    • http://www.aiim.org/pdfa/ns/property#In PDF document text
    • http://www.aiim.org/pdfa/ns/id/In PDF document text

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