Malicious PDF — malware analysis report

Static analysis result for SHA-256 8434c53fa394147b…

MALICIOUS

PDF

41.3 KB Created: 2018-12-14 20:07:25 +03:00 Authoring application: QuarkXPress(R) 7.01
MD5: 6476e78885eb62c534b0043023bb0d1e SHA-1: 53aaa52ba1c36c6e6a58294929b10b5231528cfe SHA-256: 8434c53fa394147bd09e0d4dd6ff22dd161ead552a97e0c9a3dfab689480c3b6
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links pointing to external PDF files on the domain 'gorillawalker.com'. This behavior is indicative of a link farm or SEO manipulation tactic, and the ML classifier also flagged the document as malicious. The primary attack pattern observed is the distribution of numerous external links, which could be used to distribute malware or engage in phishing. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8872

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/epicurean-simplicity.pdf
    • http://www.gorillawalker.com/theodore-boone-the-abduction-kindle-edition.pdf
    • http://www.gorillawalker.com/zoo-unabridged-audible-audio-edition.pdf
    • http://www.gorillawalker.com/playing-the-queen-s-gambit-a-grandmaster-guide.pdf
    • http://www.gorillawalker.com/things-i-wish-i-d-known-about-traveling-to-seoul.pdf
    • http://www.gorillawalker.com/the-copts-of-egypt-the-challenges-of-modernisation-and-identity.pdf
    • http://www.gorillawalker.com/advanced-spanish-grammar-a-self-teaching-guide-second-edition.pdf
    • http://www.gorillawalker.com/demographic-change-and-fiscal-policy.pdf
    • http://www.gorillawalker.com/shaggy-six-tribute-to-a-fallen-soldier.pdf
    • http://www.gorillawalker.com/using-medical-terminology-a-practical-approach.pdf
    • http://www.gorillawalker.com/ancient-legends-of-ireland.pdf
    • http://www.gorillawalker.com/cute-chics-whip-it-in-the-kitchen-too-easy-budget.pdf
    • http://www.gorillawalker.com/crazy-mountain-kiss-a-sean-stranahan-mystery.pdf
    • http://www.gorillawalker.com/international-journal-of-transgenderism-volume-8-number-1-2005.pdf
    • http://www.gorillawalker.com/bad-blood-the-tuskegee-syphilis-experiment-new-and-expanded-edition.pdf
    • http://www.gorillawalker.com/journeyman-passbooks-c409.pdf
    • http://www.gorillawalker.com/soccer-in-south-asia-empire-nation-diaspora-sport-in-the.pdf
    • http://www.gorillawalker.com/neuroscience-for-clinicians-evidence-models-and-practice.pdf
    • http://www.gorillawalker.com/where-she-went-kindle-edition.pdf
    • http://www.gorillawalker.com/slavery-in-early-mediaeval-england-from-the-reign-of-alfred.pdf
    • http://www.gorillawalker.com/the-essential-flower-gardening-encyclopedia.pdf
    • http://www.gorillawalker.com/operation-typhoon-hitler-s-march-on-moscow-october-1941.pdf
    • http://www.gorillawalker.com/irrigation-design-in-africa-towards-an-interactive-method.pdf
    • http://www.gorillawalker.com/4-symphonies-g-515-518-op-37-symphony-in-d.pdf
    • http://www.gorillawalker.com/the-wisdom-teachings-of-harish-johari-on-the-mahabharata-kindle.pdf
    • http://www.gorillawalker.com/encyclopedia-of-utopian-literature-abc-clio-literary-companion.pdf
    • http://www.gorillawalker.com/the-factors-in-organic-evolution-a-syllabus-of-a-course.pdf
    • http://www.gorillawalker.com/to-the-limits-of-endurance-one-irishman-s-war.pdf
    • http://www.gorillawalker.com/soft-target-ray-cruz-series.pdf
    • http://www.gorillawalker.com/duped-delusion-denial-and-the-end-of-the-american-dream.pdf
    • http://www.gorillawalker.com/sedation-a-guide-to-patient-management-3rd-edition-third-edition.pdf
    • http://www.gorillawalker.com/life-support-the-breathe-series-volume-2.pdf
    • http://www.gorillawalker.com/slavery-memory-and-religion-in-southeastern-ghana-c-1850-present.pdf
    • http://www.gorillawalker.com/cognitive-behavioral-stress-management-workbook-treatments-that-work.pdf
    • http://www.gorillawalker.com/the-rosary-the-little-angel-series.pdf
    • http://www.gorillawalker.com/12-lead-ecg-the-art-of-interpretation-1st-first-edition.pdf
    • http://www.gorillawalker.com/blank-stare.pdf
    • http://www.gorillawalker.com/the-french-nightmare-kindle-edition.pdf
    • http://www.gorillawalker.com/facing-the-truth.pdf
    • http://www.gorillawalker.com/implementation-and-application-of-automata-20th-international-conference-ciaa-2015.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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