Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9ff9be61a973879…

MALICIOUS

PDF

42.2 KB Created: 2018-11-26 08:22:34 +03:00 Authoring application: Acrobat PDFMaker 7.0 for Publisher (via Acrobat Distiller 7.0 (Windows))
MD5: 140a92ba90c4612bcf7217a4aaafb739 SHA-1: 03aae6b70bd765afb1cc79e390a5b28a8d9a85f5 SHA-256: a9ff9be61a9738799bed4401a64db8021bf0b8be888950927b9a68b14c8ef22c
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file was flagged by a machine learning classifier as malicious. Static analysis revealed a large number of embedded external links, characteristic of a PDF SEO link farm. While no scripts were extracted, the sheer volume of links suggests an attempt to manipulate search engine rankings or potentially serve malicious content through these external resources. The dominant host for these links is www.gorillawalker.com.

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/integrated-library-systems-planning-selecting-and-implementing.pdf
    • http://www.gorillawalker.com/overcoming-our-racism-the-journey-to-liberation.pdf
    • http://www.gorillawalker.com/beginners-guide-to-the-bull-put-spread-step-by-step.pdf
    • http://www.gorillawalker.com/all-the-news-that-s-fit-to-sell-how-the.pdf
    • http://www.gorillawalker.com/production-planning-control-and-integration.pdf
    • http://www.gorillawalker.com/erotic-dreams-the-secret-to-understanding-women-s-hidden-passions.pdf
    • http://www.gorillawalker.com/signs-and-symbols-in-christian-art-with-illustrations-from-paintings.pdf
    • http://www.gorillawalker.com/ultimate-beginner-bluegrass-mandolin-basics-book-cd-bluegrass-basics-ultimate.pdf
    • http://www.gorillawalker.com/age-of-consent-a-young-girl-s-awakening.pdf
    • http://www.gorillawalker.com/comparative-behav-african-monk.pdf
    • http://www.gorillawalker.com/a-tale-of-two-cities-penguin-readers-level-5.pdf
    • http://www.gorillawalker.com/ultimate-gay-erotica-2007.pdf
    • http://www.gorillawalker.com/aircraft-propulsion-and-gas-turbine-engines.pdf
    • http://www.gorillawalker.com/a-practitioner-s-guide-to-veterinary-dentistry.pdf
    • http://www.gorillawalker.com/the-great-siberian-railway-from-st-petersburg-to-pekin.pdf
    • http://www.gorillawalker.com/crashing-the-party-taking-on-the-corporate-government-in-an.pdf
    • http://www.gorillawalker.com/latinos-a-biography-of-the-people.pdf
    • http://www.gorillawalker.com/the-psychology-of-politics.pdf
    • http://www.gorillawalker.com/class-structure-and-economic-growth-india-and-pakistan-since-the.pdf
    • http://www.gorillawalker.com/profiled-sheet-roofing-and-cladding-a-guide-to-good-practice.pdf
    • http://www.gorillawalker.com/once-we-had-a-horse.pdf
    • http://www.gorillawalker.com/britain-s-shield-radar-and-the-defeat-of-the-luftwaffe.pdf
    • http://www.gorillawalker.com/nineteenth-century-music-the-western-classical-tradition.pdf
    • http://www.gorillawalker.com/flying-eagle.pdf
    • http://www.gorillawalker.com/s-is-for-stupid-2014-day-to-day-calendar.pdf
    • http://www.gorillawalker.com/northstar-high-intermediate-listening-and-speaking-second-edition-student-book.pdf
    • http://www.gorillawalker.com/stardust-supernovae-and-life-the-cosmic-connection.pdf
    • http://www.gorillawalker.com/rethinking-obligation-a-feminist-method-for-political-theory.pdf
    • http://www.gorillawalker.com/an-old-chinese-garden-a-three-fold-masterpiece-of-poetry.pdf
    • http://www.gorillawalker.com/electronics-engine-controls-2002-electronics-and-information-gathering.pdf
    • http://www.gorillawalker.com/advertising-for-people-who-don-t-like-advertising.pdf
    • http://www.gorillawalker.com/mount-rushmore-all-aboard-america.pdf
    • http://www.gorillawalker.com/select-speeches-of-daniel-webster-1817-1845.pdf
    • http://www.gorillawalker.com/judentum-fur-christen-vermittlung-und-selbstbehauptung-menasseh-ben-israels-in.pdf
    • http://www.gorillawalker.com/la-ciudad-letrada.pdf
    • http://www.gorillawalker.com/the-faith-that-moves-mountains-izvor.pdf
    • http://www.gorillawalker.com/parenting-your-adopted-child-a-positive-approach-to-building-a.pdf
    • http://www.gorillawalker.com/indian-economy-and-the-information-and-communications-technology-ict.pdf
    • http://www.gorillawalker.com/aviation-weather-and-weather-services.pdf
    • http://www.gorillawalker.com/deputy-sheriff-passbooks-career-examination-series-c-204.pdf
    • http://www.gorillawal
    • 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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