Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9bbc532844ef2b8…

MALICIOUS

PDF

39.7 KB Created: 2018-11-14 21:34:23 +03:00 Authoring application: LaTeX with hyperref package (via pdfTeX-1.40.10)
MD5: 052d6d7f85a38c6776cf7b9dbd6a839d SHA-1: 62cfbc3df2c43220181bf9e1f2ff7fe35310c1e6 SHA-256: b9bbc532844ef2b8e5081bd054caca21847c1c82f694f17410a1afdeadd5dbf5
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1190 Exploit Public-Facing Application

The PDF file was flagged by a machine learning classifier as malicious. Static analysis revealed a significant number of embedded external links, characteristic of a link farm or a distribution point for further malicious content. The primary heuristic indicates a 'PDF_SEO_LINK_FARM' with 32 external links, predominantly hosted on 'www.gorillawalker.com'. No scripts were extracted, and the document body was unreadable, but the sheer volume of links suggests an intent to direct users to potentially compromised or malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9181

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/revelations-of-the-sisterhood-club.pdf
    • http://www.gorillawalker.com/the-indian-pantry.pdf
    • http://www.gorillawalker.com/wireless-communications-and-telecom-equipment-report-download-pdf-digital.pdf
    • http://www.gorillawalker.com/hot-wheels-a-collector-s-guide.pdf
    • http://www.gorillawalker.com/pooped-puppies-2009-daily-boxed-calendar-calendar.pdf
    • http://www.gorillawalker.com/what-the-songs-look-like-contemporary-artists-interpret-talking-heads.pdf
    • http://www.gorillawalker.com/census-of-agriculture-sudoc-gp-3-22-2-277.pdf
    • http://www.gorillawalker.com/lux-aeterna-mass-effects-kindle-edition.pdf
    • http://www.gorillawalker.com/export-import-procedures-and-documentation-4th-fourth-edition.pdf
    • http://www.gorillawalker.com/sea-kayaking-the-carolinas-2nd-edition-by-bannon-james-2003.pdf
    • http://www.gorillawalker.com/air-force-one-the-aircraft-that-shaped-the-modern-presidency.pdf
    • http://www.gorillawalker.com/ira-nowinski-s-san-francisco-poets-politics-and-divas.pdf
    • http://www.gorillawalker.com/psychokinesis-the-way-of-the-psion.pdf
    • http://www.gorillawalker.com/premium-1st-edition-advanced-dungeons-dragons-unearthed-arcana-d-d.pdf
    • http://www.gorillawalker.com/a-modern-girl-s-guide-to-bible-study-a-refreshingly.pdf
    • http://www.gorillawalker.com/100th-anniversary-of-rerum-novarum-centesimus-annus-encyclical-letter-addressed.pdf
    • http://www.gorillawalker.com/fuel-system-design-for-fuel-economy-and-reduced-emissions-s.pdf
    • http://www.gorillawalker.com/quelques-mots.pdf
    • http://www.gorillawalker.com/teach-yourself-new-testament-greek-teach-yourself-complete-courses.pdf
    • http://www.gorillawalker.com/the-green-teen-cookbook-kindle-edition.pdf
    • http://www.gorillawalker.com/graph-theory-with-engineering-applications.pdf
    • http://www.gorillawalker.com/piercing-the-fold.pdf
    • http://www.gorillawalker.com/king-of-the-wind-masterwork-series.pdf
    • http://www.gorillawalker.com/phase-locked-loop-engineering-handbook-for-integrated-circuits.pdf
    • http://www.gorillawalker.com/a-visitor-s-guide-to-a-history-of-britain-locations.pdf
    • http://www.gorillawalker.com/the-takeout-cookbook-how-to-order-eat-and-care-for.pdf
    • http://www.gorillawalker.com/a-history-of-the-philippines-illustrated.pdf
    • http://www.gorillawalker.com/the-eat-local-cookbook-seasonal-recipes-from-a-maine-farm.pdf
    • http://www.gorillawalker.com/j-b-priestley-s-yorkshire.pdf
    • http://www.gorillawalker.com/reprisal-a-dark-erotic-thriller.pdf
    • http://www.gorillawalker.com/she-wanted-a-love-poem.pdf
    • http://www.gorillawalker.com/domain-errors-cyberfeminist-practices.pdf
    • http://www.gorillawalker.com/three-years-in-chili.pdf
    • http://www.gorillawalker.com/el-mapa-del-caos-map-of-chaos-spanish-edition-novela.pdf
    • http://www.gorillawalker.com/the-runaway-roommate-kdrama-chronicles-book-1-kindle-edition.pdf
    • http://www.gorillawalker.com/first-supplement-to-typical-reptiles-and-amphibians-1946-bulletin-of.pdf
    • http://www.gorillawalker.com/aeschylus-oresteia-a-literary-commentary.pdf
    • http://www.gorillawalker.com/flight-279.pdf
    • http://www.gorillawalker.com/waddles-presents-aquatic-safety-american-red-cross-child-story-activity.pdf
    • http://www.gorillawalker.com/stalking-the-caravan-a-drug-agent-in-afghanistan-1971-1973.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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