Malicious PDF — malware analysis report

Static analysis result for SHA-256 b157a90f08e16ee0…

MALICIOUS

PDF

45.4 KB Created: 2018-12-02 10:55:12 +03:00 Authoring application: FrameMaker 6.0 (via Acrobat Distiller 6.0.1 for Macintosh)
MD5: 8c67d78be610477570e5bbff63a4710a SHA-1: 3769208df579c2a37a63070b3ef42b92f8b8eb50 SHA-256: b157a90f08e16ee0789da4b9d3d95ab946255d0985849332375c6706e8328ef8
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 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 embedded external links, suggesting a link farm or SEO abuse. The document body is heavily obfuscated and contains numerous URLs pointing to PDF files on the domain 'gorillawalker.com'. The primary attack pattern appears to be the distribution of a large number of links, likely to manipulate search engine rankings or to serve as a distribution point for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7914

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/vegetarian-world-food.pdf
    • http://www.gorillawalker.com/a-new-commentary-on-the-poems-of-w-b-yeats.pdf
    • http://www.gorillawalker.com/prevention-the-sugar-solution-cookbook.pdf
    • http://www.gorillawalker.com/modern-compiler-implementation-in-ml-kindle-edition.pdf
    • http://www.gorillawalker.com/an-ya-and-her-diary-reader-parent-guide-the-an.pdf
    • http://www.gorillawalker.com/terrorism-inc-the-financing-of-terrorism-insurgency-and-irregular-warfare.pdf
    • http://www.gorillawalker.com/annuals-for-michigan-annuals-for.pdf
    • http://www.gorillawalker.com/nextext-historical-readers-the-civil-war-the-civil-war.pdf
    • http://www.gorillawalker.com/haunted-breckenridge-haunted-america.pdf
    • http://www.gorillawalker.com/special-education-law-a-guide-for-parents-advocates-and-educators.pdf
    • http://www.gorillawalker.com/the-implementation-of-health-promoting-schools-exploring-the-theories-of.pdf
    • http://www.gorillawalker.com/healthy-skin-60-tips.pdf
    • http://www.gorillawalker.com/a-survey-of-metaphysics.pdf
    • http://www.gorillawalker.com/always-rachel-the-letters-of-rachel-carson-and-dorothy-freeman.pdf
    • http://www.gorillawalker.com/everything-you-ve-ever-wanted-to-know-about-lotto.pdf
    • http://www.gorillawalker.com/serving-job-seekers-and-career-changers-a-planning-manual-for.pdf
    • http://www.gorillawalker.com/frame-analysis-an-essay-on-the-organization-of-experience.pdf
    • http://www.gorillawalker.com/japan-knigge-f-r-manager.pdf
    • http://www.gorillawalker.com/gurps-russia.pdf
    • http://www.gorillawalker.com/power-of-the-gunn-gunn-trilogy-volume-1.pdf
    • http://www.gorillawalker.com/the-art-of-seamanship-evolving-skills-exploring-oceans-and-handling.pdf
    • http://www.gorillawalker.com/guide-to-far-contract-clauses-detailed-compliance-information-for-government.pdf
    • http://www.gorillawalker.com/shoulder-sleeve-insignia-of-the-american-expeditionary-forces-1918-1919.pdf
    • http://www.gorillawalker.com/i-am-malala-the-girl-who-stood-up-for-education.pdf
    • http://www.gorillawalker.com/life-and-doctrine-of-saint-catherine-of-genoa.pdf
    • http://www.gorillawalker.com/experience-of-nationhood-australia-and-the-world-since-1900-years.pdf
    • http://www.gorillawalker.com/a-woman-s-wartime-journal-an-account-of-the-passage.pdf
    • http://www.gorillawalker.com/physics-of-amorphous-semiconductors.pdf
    • http://www.gorillawalker.com/managing-foundations-and-charitable-trusts-essential-knowledge-tools-and-techniques.pdf
    • http://www.gorillawalker.com/postmodern-after-images-a-reader-in-film-television-and-video.pdf
    • http://www.gorillawalker.com/101-winning-volleyball-drills-from-avca-the-art-science-of.pdf
    • http://www.gorillawalker.com/speech-can-change-your-life.pdf
    • http://www.gorillawalker.com/flags-of-our-fathers-heroes-of-iwo-jima-youth-edition.pdf
    • http://www.gorillawalker.com/market-dominance-how-firms-gain-hold-or-lose-it-and.pdf
    • http://www.gorillawalker.com/dammi-tu-forza-o-cielo-no-9-from-la-traviata.pdf
    • http://www.gorillawalker.com/aliens-across-america.pdf
    • http://www.gorillawalker.com/little-noisy-trucks.pdf
    • http://www.gorillawalker.com/payback-the-case-for-revenge.pdf
    • http://www.gorillawalker.com/the-lambi-s-call-a-haitian-journey.pdf
    • http://www.gorillawalker.com/building-the-nation-and-other-poems.pdf
    • http://www.gorillawalker.com/terrorism-inc-the-financing-of-terrorism-insurgenc
    • 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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