Malicious PDF — malware analysis report

Static analysis result for SHA-256 46bfcf0abe3e785a…

MALICIOUS

PDF

42.2 KB Created: 2018-12-07 18:27:51 +03:00 Authoring application: Microsoft Word 8.0 (via Acrobat Distiller 4.0 for Windows)
MD5: c9a06fbee4528b6f7f215956140f7d36 SHA-1: 78068472587aed3b0110288598fd0b8bca84f14d SHA-256: 46bfcf0abe3e785a567ccd70f7d8d97a746c29d678041fdcedc64a1ed54ec1a9
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded URLs pointing to the same domain, suggesting a link farm or SEO manipulation tactic. The ML classifier also flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure. The primary attack pattern observed is the mass distribution of external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9027

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/two-treatises-of-government-unabridged-audible-audio-edition.pdf
    • http://www.gorillawalker.com/intermediate-aerodynamics.pdf
    • http://www.gorillawalker.com/cuba-from-columbus-to-castro.pdf
    • http://www.gorillawalker.com/die-regatta-der-h.pdf
    • http://www.gorillawalker.com/running-quickbooks-in-nonprofits-2nd-edition-the-only-comprehensive-guide.pdf
    • http://www.gorillawalker.com/sushi-para-hoy-everyday-spanish-edition.pdf
    • http://www.gorillawalker.com/the-kategan-alphas-vol-2-paranormal-erotic-romance-books-4.pdf
    • http://www.gorillawalker.com/how-not-to-do-things.pdf
    • http://www.gorillawalker.com/writing-systems-a-linguistic-introduction.pdf
    • http://www.gorillawalker.com/swing-city-newark-nightlife-1925-50.pdf
    • http://www.gorillawalker.com/immersed-in-media-telepresence-theory-measurement-technology.pdf
    • http://www.gorillawalker.com/the-tender-heart-conquering-your-insecurity.pdf
    • http://www.gorillawalker.com/building-in-the-garden.pdf
    • http://www.gorillawalker.com/domine-fili-unigenite-from-gloria-antonio-lucio-vivaldi-satb-sheet.pdf
    • http://www.gorillawalker.com/focus-on-speed-proportion-ratio-kumon-focus-on-workbook.pdf
    • http://www.gorillawalker.com/yemen-a-photographic-journey.pdf
    • http://www.gorillawalker.com/dante-how-to-know-him.pdf
    • http://www.gorillawalker.com/the-new-hypnosis-in-sex-therapy-cognitive-behavioral-methods-for.pdf
    • http://www.gorillawalker.com/the-civilizing-process-sociogenetic-and-psychogenetic-investigations.pdf
    • http://www.gorillawalker.com/the-poetics-of-translation-history-theory-practice.pdf
    • http://www.gorillawalker.com/global-health-an-introductory-textbook.pdf
    • http://www.gorillawalker.com/the-case-of-the-six-coffins-pulp-classics.pdf
    • http://www.gorillawalker.com/passage-through-trinidad-journal-of-a-surgical-sex-change.pdf
    • http://www.gorillawalker.com/the-singing-book.pdf
    • http://www.gorillawalker.com/wine-lovers-quotations-for-appreciators-of-the-vine.pdf
    • http://www.gorillawalker.com/world-radio-tv-handbook-2008-the-directory-of-global-broadcasting.pdf
    • http://www.gorillawalker.com/introduction-to-old-english.pdf
    • http://www.gorillawalker.com/croft-dorothy-violin-theory-for-beginners-book-1-southern-music.pdf
    • http://www.gorillawalker.com/gods-in-our-midst-mythological-images-of-the-masculine-a.pdf
    • http://www.gorillawalker.com/e-encyclopedia-animal.pdf
    • http://www.gorillawalker.com/surveys-from-exile-political-writings-marx-s-political-writings.pdf
    • http://www.gorillawalker.com/we-walked-across-their-graves-vietnam-1967-the-que-son.pdf
    • http://www.gorillawalker.com/the-american-political-tradition-and-the-men-who-made-it.pdf
    • http://www.gorillawalker.com/theory-of-matroids-encyclopedia-of-mathematics-and-its-applications.pdf
    • http://www.gorillawalker.com/history-of-the-kuykendall-family-since-its-settlement-in-dutch.pdf
    • http://www.gorillawalker.com/general-interests-of-host-states-in-international-investment-law-cambridge.pdf
    • http://www.gorillawalker.com/william-harvey-genius-discoverer-of-blood-circulation-genius-scientists-and.pdf
    • http://www.gorillawalker.com/viral-change.pdf
    • http://www.gorillawalker.com/applied-physical-pharmacy.pdf
    • http://www.gorillawalker.com/the-evolution-of-automotive-technology-a-handbook.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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