Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a71f686bb114315…

MALICIOUS

PDF

43.9 KB Created: 2018-12-02 10:56:58 +03:00 Authoring application: PageMaker 6.5 (via Acrobat Distiller 4.05 for Windows)
MD5: d9f2e671ecc17096dac2adf241616397 SHA-1: 718d51c6472965e44c58a065ea901101363fbe09 SHA-256: 4a71f686bb114315bf0a912f087bd44b9a2002d0f325a3691e51baca6bf95f77
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious. The primary attack pattern involves directing users to a link farm, likely to manipulate search engine rankings or distribute additional malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8439

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/clinical-rheumatology-2016-the-clinical-medicine-series-book-14.pdf
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    • http://www.gorillawalker.com/pharaohs-of-the-sky.pdf
    • http://www.gorillawalker.com/saint-thomas-and-the-problem-of-evil-aquinas-lecture-6.pdf
    • http://www.gorillawalker.com/managing-small-construction-business.pdf
    • http://www.gorillawalker.com/great-source-aim-social-studies-student-edition-global.pdf
    • http://www.gorillawalker.com/total-colourings-of-graphs-lecture-notes-in-mathematics.pdf
    • http://www.gorillawalker.com/frog-and-rat-frog-series.pdf
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    • http://www.gorillawalker.com/epirus-a-study-in-greek-constitutional-development.pdf
    • http://www.gorillawalker.com/isbn-0205645216-joining-together-group-theory-and-group-skills-by.pdf
    • http://www.gorillawalker.com/your-father-s-voice-letters-for-emmy-about-life-with.pdf
    • http://www.gorillawalker.com/hair-transplantation.pdf
    • http://www.gorillawalker.com/albanileria-y-autoconstruccion-iii-spanish-edition.pdf
    • http://www.gorillawalker.com/7-days-math-multiplication-series-5-digit-multiplicands-5-digit.pdf
    • http://www.gorillawalker.com/jane-scrivner-s-total-detox-6-ways-to-revitalise-your.pdf
    • http://www.gorillawalker.com/peasant-life-in-china-a-field-study-of-country-life.pdf
    • http://www.gorillawalker.com/more-jonathan-papers.pdf
    • http://www.gorillawalker.com/essential-algorithms-a-practical-approach-to-computer-algorithms.pdf
    • http://www.gorillawalker.com/the-greatest-moments-in-sports-upsets-and-underdogs.pdf
    • http://www.gorillawalker.com/web-locator-directory-an-article-from-wood-wood-products-html.pdf
    • http://www.gorillawalker.com/it-s-not-over-until-you-win-how-to-become.pdf
    • http://www.gorillawalker.com/optics-for-clinicians-2nd-edition.pdf
    • http://www.gorillawalker.com/environmental-and-occupational-medicine-3rd-third-edition-by-rom-william.pdf
    • http://www.gorillawalker.com/abdominal-ultrasound-for-the-small-animal-practitioner.pdf
    • http://www.gorillawalker.com/seller-financing-and-real-estate-notes-in-the-dodd-frank.pdf
    • http://www.gorillawalker.com/wild-animals-high-interest-low-readability-nonfiction.pdf
    • http://www.gorillawalker.com/play-praise-most-requested-book-1-11-piano-arrangements-of.pdf
    • http://www.gorillawalker.com/defining-psychopathology-in-the-21st-century-dsm-v-and-beyond.pdf
    • http://www.gorillawalker.com/bridging-the-gap-between-college-and-law-school.pdf
    • http://www.gorillawalker.com/the-best-of-alter-ego-volume-2.pdf
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    • http://www.gorillawalker.com/a-hero-betrayed-a-futuristic-erotic-romance-pleasure-bound-book.pdf
    • http://www.gorillawalker.com/uniform-plumbing-code-2000.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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