Malicious PDF — malware analysis report

Static analysis result for SHA-256 3805c52c45cab365…

MALICIOUS

PDF

44.1 KB Created: 2018-12-08 04:17:09 +03:00 Authoring application: Adobe PageMaker 6.52 (via Acrobat Distiller 3.01 for Windows)
MD5: 36dab7fb13c05acb3ab582e5cb7ed515 SHA-1: 11f654cd69e8da2a3535945f8c034eb55ae54b24 SHA-256: 3805c52c45cab3650573acc0cce398e1e10dfa1e4af02071a668bd1492fc559f
90 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The document body is heavily obfuscated and unreadable, providing no direct clues about its intent. The primary attack pattern observed is the mass linking to external PDFs hosted on www.gorillawalker.com.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8173

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/the-law-of-torts-or-private-wrongs-volume-1-of.pdf
    • http://www.gorillawalker.com/archetypes-in-branding-a-toolkit-for-creatives-and-strategists-by.pdf
    • http://www.gorillawalker.com/seismic-shock-and-vibration-isolation-1990-h00618-volume-200-pvp.pdf
    • http://www.gorillawalker.com/the-art-of-buying-art-an-insider-s-guide-to.pdf
    • http://www.gorillawalker.com/i-quit-sugar-slow-cooker-cookbook-i-quit-sugar.pdf
    • http://www.gorillawalker.com/the-cruel-birth-of-bangladesh-memoirs-of-an-american-dipolmat.pdf
    • http://www.gorillawalker.com/scrabble-crossword-game-no-17-1953-selchow-righter-co.pdf
    • http://www.gorillawalker.com/water-wheels-or-hydraulic-motors.pdf
    • http://www.gorillawalker.com/passing-a-novel.pdf
    • http://www.gorillawalker.com/unexplored-new-guinea-a-record-of-the-travels-adventures-and.pdf
    • http://www.gorillawalker.com/la-baraja-y-t-destino-baraja-espa-ola-spanish-edition.pdf
    • http://www.gorillawalker.com/the-royal-marsden-hospital-manual-of-clinical-nursing-procedures.pdf
    • http://www.gorillawalker.com/interdisciplinarity-its-role-in-a-discipline-based-academy.pdf
    • http://www.gorillawalker.com/city-of-fire-unabridged-audible-audio-edition.pdf
    • http://www.gorillawalker.com/the-deadly-stripper-the-sexy-damned-series-book-1.pdf
    • http://www.gorillawalker.com/always-say-hello-to-life.pdf
    • http://www.gorillawalker.com/kalamkari-temple-hangings.pdf
    • http://www.gorillawalker.com/the-art-of-calendar-design.pdf
    • http://www.gorillawalker.com/david-busch-s-sony-alpha-dslr-a390-a290-guide-to.pdf
    • http://www.gorillawalker.com/major-problems-in-the-history-of-american-medicine-and-public.pdf
    • http://www.gorillawalker.com/out-to-work-the-history-of-wage-earning-women-in.pdf
    • http://www.gorillawalker.com/real-life-english-audio-cd-literacy.pdf
    • http://www.gorillawalker.com/dumb-bells-dopamine-a-parkinson-s-success-story.pdf
    • http://www.gorillawalker.com/uptight.pdf
    • http://www.gorillawalker.com/shadow-lands-the-warrior-chronicles-3.pdf
    • http://www.gorillawalker.com/birdology-adventures-with-hip-hop-parrots-cantankerous-cassowaries-crabby-crows.pdf
    • http://www.gorillawalker.com/your-body-s-many-cries-for-water-a-preventive-and.pdf
    • http://www.gorillawalker.com/under-the-ice-a-marine-biologist-at-work.pdf
    • http://www.gorillawalker.com/the-full-box-gift-set.pdf
    • http://www.gorillawalker.com/i-witness-the-shocking-insider-s-story-of-jehovah-s.pdf
    • http://www.gorillawalker.com/sure-win-baccarat-iii-best-online-betting-system.pdf
    • http://www.gorillawalker.com/southern-baptists-and-southern-slavery-the-forgotten-crime-against-humanity.pdf
    • http://www.gorillawalker.com/teaching-the-nuts-and-bolts-of-physical-education-building-basic.pdf
    • http://www.gorillawalker.com/a-radical-approach-to-lebesgue-s-theory-of-integration-mathematical.pdf
    • http://www.gorillawalker.com/world-catalogue-of-the-genus-carabus-l-pensoft-series-faunistica.pdf
    • http://www.gorillawalker.com/the-philosophy-of-religious-language-sign-symbol-and-story.pdf
    • http://www.gorillawalker.com/the-community-land-trust-reader.pdf
    • http://www.gorillawalker.com/the-ballad-of-bawdy-mcclure.pdf
    • http://www.gorillawalker.com/kusumabale.pdf
    • http://www.gorillawalker.com/biogea-univocal.pdf
    • http://www.gorillawalker.com/the-cruel-birth-of-bangladesh
    • 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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