Malicious PDF — malware analysis report

Static analysis result for SHA-256 d820d43a681de26f…

MALICIOUS

PDF

41.3 KB Created: 2018-12-07 18:29:55 +03:00 Authoring application: PDF CoDe 2015.5473 (c) 2002-2015 European Commission
MD5: 96f6f1769e7e3ac3be18ab6bc0ceafc6 SHA-1: 9322859999432f03347cea21dabd62b43878b207 SHA-256: d820d43a681de26fae4340ec77fa38bce39eaaad866a11bc8305dec807834ab6
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged by a machine learning classifier and contains a large number of embedded external links, primarily pointing to PDF files hosted on www.gorillawalker.com. This suggests a link farm or SEO manipulation tactic. While no scripts were extracted, the sheer volume of links and the ML classification indicate malicious intent, likely to distribute further malicious content or manipulate search engine rankings.

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/dark-cloud-2-prima-s-official-strategy-guide.pdf
    • http://www.gorillawalker.com/the-optimal-ketogenic-diet-guide-proven-benefits-of-a-low.pdf
    • http://www.gorillawalker.com/elijah-s-ultimate-guide-to-the-disneyland-resort-2015-elijah.pdf
    • http://www.gorillawalker.com/outlines-highlights-for-physics-matters-an-introduction-to-conceptual-physics.pdf
    • http://www.gorillawalker.com/books-top-tens.pdf
    • http://www.gorillawalker.com/explanation-in-causal-inference-methods-for-mediation-and-interaction.pdf
    • http://www.gorillawalker.com/allyn-bacon-guide-to-writing-the-concise-edition-plus-new.pdf
    • http://www.gorillawalker.com/savor-michigan-cookbook-michigan-s-finest-restaurants-their-recipes-their.pdf
    • http://www.gorillawalker.com/celestial-cardplay-master-bridge-series.pdf
    • http://www.gorillawalker.com/gedi-sibony.pdf
    • http://www.gorillawalker.com/the-glorious-foods-of-greece-traditional-recipes-from-the-islands.pdf
    • http://www.gorillawalker.com/help-for-the-caring-a-bibliography-and-filmography-for-family.pdf
    • http://www.gorillawalker.com/basic-report-writing-for-law-enforcement-and-security.pdf
    • http://www.gorillawalker.com/brother-to-the-ox-little-toller-monograph.pdf
    • http://www.gorillawalker.com/chelation-of-heavy-metals-international-encyclopaedia-of-pharmacology.pdf
    • http://www.gorillawalker.com/the-arthurian-tradition-the-element-library.pdf
    • http://www.gorillawalker.com/odd-men-out.pdf
    • http://www.gorillawalker.com/sumando-animales-spanish-edition.pdf
    • http://www.gorillawalker.com/the-templars-selected-sources.pdf
    • http://www.gorillawalker.com/high-fiber-and-low-fiber-diets-kindle-edition.pdf
    • http://www.gorillawalker.com/star-force-benefactor-sf19-kindle-edition.pdf
    • http://www.gorillawalker.com/dead-man-working.pdf
    • http://www.gorillawalker.com/the-self-organizing-universe-scientific-and-human-implications-of-the.pdf
    • http://www.gorillawalker.com/bolton-s-handbook-of-canine-and-feline-electrocardiography.pdf
    • http://www.gorillawalker.com/the-canon-of-the-bible-and-the-apocrypha-in-the.pdf
    • http://www.gorillawalker.com/tomorrow-always-comes.pdf
    • http://www.gorillawalker.com/cisco-routers-for-the-desperate-router-and-switch-management-the.pdf
    • http://www.gorillawalker.com/forecast-selected-early-poems-1970-1990.pdf
    • http://www.gorillawalker.com/family-wealth-keeping-it-in-the-family-how-family-members.pdf
    • http://www.gorillawalker.com/the-bubble-collector-poems-and-drawings-by-vikram-madan.pdf
    • http://www.gorillawalker.com/pyramide-stage-1.pdf
    • http://www.gorillawalker.com/frozen-taken.pdf
    • http://www.gorillawalker.com/targeting-social-network-analysis-in-counter-ied-operations.pdf
    • http://www.gorillawalker.com/the-etiquette-advantage-in-business-third-edition-personal-skills-for.pdf
    • http://www.gorillawalker.com/phr-sphr-professional-in-human-resources-certification-all-in-one.pdf
    • http://www.gorillawalker.com/undermajordomo-minor.pdf
    • http://www.gorillawalker.com/kisumu-town-history-of-the-built-form-planning-and-environment.pdf
    • http://www.gorillawalker.com/international-security-problems-and-solutions.pdf
    • http://www.gorillawalker.com/lord-of-the-flies-multiple-critical-perspectives.pdf
    • http://www.gorillawalker.com/emergencies-of-the-head-and-neck-1e.pdf
    • http://www.gorillawalker.com/savor-michigan-cookbook-michigan-s-finest-restaurants
    • 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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