Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aad024ac70305c8…

MALICIOUS

PDF

44.5 KB Created: 2019-03-17 04:45:50 +03:00 Authoring application: - (via GNU Ghostscript 6.53)
MD5: 4c8515fe71f805c93d032613f3477976 SHA-1: e6ddd633874b48808b669b167101b9119781c9e6 SHA-256: 4aad024ac70305c8c9244eb236deb6a7fad1155b2245d3a3b7abeb4c6a21c3eb
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to external PDF files, as detected by the PDF_SEO_LINK_FARM heuristic. This suggests a link farm or redirection strategy. The ML classifier also flagged the document as malicious. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8223

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/helicopters-on-the-move-lightning-bolt-books.pdf
    • http://www.gorillawalker.com/color-atlas-of-clinical-application-of-fiberoptic-bronchoscopy.pdf
    • http://www.gorillawalker.com/principles-of-radiography-for-technologists.pdf
    • http://www.gorillawalker.com/steal-from-the-poor-and-disabled-kindle-edition.pdf
    • http://www.gorillawalker.com/invisible-users-youth-in-the-internet-caf-s-of-urban.pdf
    • http://www.gorillawalker.com/streetsmart-las-vegas-map-by-vandam-city-street-map-of.pdf
    • http://www.gorillawalker.com/values-and-objectivity-in-science-the-current-controversy-about-transgenic.pdf
    • http://www.gorillawalker.com/military-space-a-air-opportunities-air-route-map.pdf
    • http://www.gorillawalker.com/only-one-life-unabridged-audible-audio-edition.pdf
    • http://www.gorillawalker.com/a-boundary-waters-fishing-guide.pdf
    • http://www.gorillawalker.com/advances-in-cryptology-eurocrypt-98-international-conference-on-the-theory.pdf
    • http://www.gorillawalker.com/topology-of-closed-one-forms-mathematical-surveys-and-monographs.pdf
    • http://www.gorillawalker.com/padres-asegururan-que-sus-hijos-sean-estudiantes-exitosos-spanish-edition.pdf
    • http://www.gorillawalker.com/matrix-based-multigrid-theory-and-applications-numerical-methods-and-algorithms.pdf
    • http://www.gorillawalker.com/mars-and-venus-in-the-bedroom.pdf
    • http://www.gorillawalker.com/phonetics-and-speech-science-a-bilingual-dictionary-american-university-studie.pdf
    • http://www.gorillawalker.com/the-world-of-the-meiji-print-impressions-of-a-new.pdf
    • http://www.gorillawalker.com/preventive-social-medicine-b-jain-bhms-solved-papers.pdf
    • http://www.gorillawalker.com/the-month-brothers-a-slavic-tale.pdf
    • http://www.gorillawalker.com/the-golden-age-of-botanical-art.pdf
    • http://www.gorillawalker.com/by-john-martin-neuroanatomy-text-and-atlas-3rd-edition.pdf
    • http://www.gorillawalker.com/moral-philosophy-theories-and-issues.pdf
    • http://www.gorillawalker.com/quick-escapes-from-philadelphia-the-best-weekend-getaways-quick-escapes.pdf
    • http://www.gorillawalker.com/hansel-and-gretel-mother-knows-best-ruin-a-classic-book.pdf
    • http://www.gorillawalker.com/the-golden-age-of-air-travel-shire-library-by-hadaway.pdf
    • http://www.gorillawalker.com/gold-placers-of-california.pdf
    • http://www.gorillawalker.com/cset-spanish-teacher-certification-test-prep-study-guide.pdf
    • http://www.gorillawalker.com/the-happy-life-of-preston-katt-a-novel.pdf
    • http://www.gorillawalker.com/the-decoy-princess.pdf
    • http://www.gorillawalker.com/what-to-tell-the-kids-about-your-divorce.pdf
    • http://www.gorillawalker.com/wine-and-drinks-2011-wall-calendar.pdf
    • http://www.gorillawalker.com/newcomer-s-handbook-for-moving-to-and-living-in-minneapolis.pdf
    • http://www.gorillawalker.com/autonomic-nerves.pdf
    • http://www.gorillawalker.com/college-trigonometry-6th-sixth-edition.pdf
    • http://www.gorillawalker.com/becoming-divergent-an-unofficial-biography-of-shailene-woodley-and-theo.pdf
    • http://www.gorillawalker.com/understanding-canon-17-of-the-1983-code-of-canon-law.pdf
    • http://www.gorillawalker.com/my-beau-s-baby-2-taboo-pregnancy-erotica.pdf
    • http://www.gorillawalker.com/ambitions-of-the-deprived.pdf
    • http://www.gorillawalker.com/artfolds-christmas-tree-christmas-memories-artfolds-color-editions.pdf
    • http://www.gorillawalker.com/alive-and-cooking-an-easy-guide-to-health-for-you.pdf
    • http://www.gorillawalker.com
    • 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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