Malicious PDF — malware analysis report

Static analysis result for SHA-256 5141ed9394efed5e…

MALICIOUS

PDF

43.9 KB Created: 2019-03-17 06:54:29 +03:00 Authoring application: QuarkXPress(R) 7.01
MD5: a8f8132fa35ec22feea3330cf03ebb2a SHA-1: e80204fdbc8ff995db63d92d5eca257d9556c031 SHA-256: 5141ed9394efed5e3903ad83ec37dc36014579f509a83c344890a48b086a0494
90 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious. A critical heuristic identified a large number of external PDF links, with the first URL being http://www.gorillawalker.com/the-apple-in-the-dark.pdf. The document body contains obfuscated text and embedded URLs, suggesting an attempt to disguise its malicious intent. The primary attack pattern appears to be a link farm designed to direct users to external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9007

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-apple-in-the-dark.pdf
    • http://www.gorillawalker.com/night-over-day-over-nigh.pdf
    • http://www.gorillawalker.com/ticket-home.pdf
    • http://www.gorillawalker.com/the-imperial-congress-crisis-in-the-separation-of-powers.pdf
    • http://www.gorillawalker.com/memoirs-of-a-voluptuary-volume-ii-or-the-secret-life.pdf
    • http://www.gorillawalker.com/the-crimson-orb.pdf
    • http://www.gorillawalker.com/using-the-enneagram-in-prayer-a-contemplative-guide.pdf
    • http://www.gorillawalker.com/resin-microscopy-and-on-section-immunocytochemistry-springer-lab-manuals.pdf
    • http://www.gorillawalker.com/kentucky-school-laws-annotated-2014-edition-kindle-edition.pdf
    • http://www.gorillawalker.com/suzanne-rheinstein-rooms-for-living-a-style-for-today-with.pdf
    • http://www.gorillawalker.com/kiss-bow-or-shake-hands-the-bestselling-guide-to-doing.pdf
    • http://www.gorillawalker.com/a-month-in-the-country-a-comedy-in-five-acts.pdf
    • http://www.gorillawalker.com/the-story-of-rock-music-pop-histories.pdf
    • http://www.gorillawalker.com/responding-to-terrorism-challenges-for-democracy-choices-program.pdf
    • http://www.gorillawalker.com/the-sedimentary-record-of-sea-level-change.pdf
    • http://www.gorillawalker.com/the-crisis-of-america-s-cities-solutions-for-the-future.pdf
    • http://www.gorillawalker.com/filmcraft-editing-of-justin-chang-on-16-january-2012.pdf
    • http://www.gorillawalker.com/visible-saints-the-history-of-a-puritan-idea.pdf
    • http://www.gorillawalker.com/conversations-with-my-agent-and-set-up-joke-set-up.pdf
    • http://www.gorillawalker.com/aa-driving-test-practical-and-the-highway-code.pdf
    • http://www.gorillawalker.com/mitrofanov-s-deflection-annex-annex.pdf
    • http://www.gorillawalker.com/the-egyptian-sudan-its-history-and-monuments-volume-2.pdf
    • http://www.gorillawalker.com/the-complete-letters-of-sigmund-freud-to-wilhelm-fliess-1887.pdf
    • http://www.gorillawalker.com/deserts-earth-files.pdf
    • http://www.gorillawalker.com/spiritual-gems-of-islam-insights-practices-from-the-qur-an.pdf
    • http://www.gorillawalker.com/noise-and-fluctuations-an-introduction-dover-books-on-physics.pdf
    • http://www.gorillawalker.com/secrets-of-the-patagonian-barbecue-english-and-spanish-edition.pdf
    • http://www.gorillawalker.com/prophecy-key-to-the-future.pdf
    • http://www.gorillawalker.com/an-ocean-view-perspectives-in-marine-science.pdf
    • http://www.gorillawalker.com/un-beso-en-mi-mano-spanish-edition.pdf
    • http://www.gorillawalker.com/computational-counterpoint-worlds-mathematical-theory-software-and-experiments-computational-music.pdf
    • http://www.gorillawalker.com/statistical-models-in-psychological-ed.pdf
    • http://www.gorillawalker.com/idempotent-matrices-over-complex-group-algebras-universitext.pdf
    • http://www.gorillawalker.com/right-hemisphere-communication-disorders-neurogenic-communication-disorders-series.pdf
    • http://www.gorillawalker.com/facebook-marketing-fur-dummies-german-edition.pdf
    • http://www.gorillawalker.com/theme-from-symphony-no-40-grade-3-clarinet-solo-ludwig.pdf
    • http://www.gorillawalker.com/vulnerable-children-and-the-law-international-evidence-for-improving-child.pdf
    • http://www.gorillawalker.com/empowered-deluxe-edition-volume-2.pdf
    • http://www.gorillawalker.com/essentials-of-clinical-research.pdf
    • http://www.gorillawalker.com/life-management-skills-iii-reproducible-activity-handouts-created-for-facilitators.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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