Malicious PDF — malware analysis report

Static analysis result for SHA-256 abfa006b0cbc6a53…

MALICIOUS

PDF

42.6 KB Created: 2019-03-17 11:30:28 +03:00 Authoring application: doPDF Ver 7.1 Build 349 (Windows XP Professional Edition (SP 3) - Version: 5.1.2600 (x86))
MD5: 139ef24731d6df8b10e0fb7aeab02ece SHA-1: 18f37a3efb014edd04a16ce524eefb1e0ae3d5ae SHA-256: abfa006b0cbc6a53969bfc7a42767970ee634fd1a7e4c806e1b7f8ddf6a69027
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, primarily hosted on 'gorillawalker.com'. This behavior is indicative of a link farm, often used for SEO manipulation or to distribute malicious content. The ML classifier also flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8469

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/orthopaedic-basic-science.pdf
    • http://www.gorillawalker.com/the-bamboo-cookbook.pdf
    • http://www.gorillawalker.com/unspoken-a-rhetoric-of-silence.pdf
    • http://www.gorillawalker.com/groom-lake.pdf
    • http://www.gorillawalker.com/logic-for-problem-solving-artificial-intelligence-series.pdf
    • http://www.gorillawalker.com/technology-law-and-the-working-environment-revised-edition.pdf
    • http://www.gorillawalker.com/great-source-write-source-spanish-texas-student-edition-grade-5.pdf
    • http://www.gorillawalker.com/oleo-de-oregano-woodland-health.pdf
    • http://www.gorillawalker.com/dearest-darkest-daughter.pdf
    • http://www.gorillawalker.com/playing-with-fire-signed-edition.pdf
    • http://www.gorillawalker.com/organizational-behavior-and-self-assessment-library-3-4-16th-edition.pdf
    • http://www.gorillawalker.com/2-episoden-aus-lenau-s-faust-s-110-der-naechtliche.pdf
    • http://www.gorillawalker.com/by-rob-goss-japan-tuttle-travel-pack-your-guide-to.pdf
    • http://www.gorillawalker.com/treasure-hunting-looking-for-lost-riches-high-five-reading.pdf
    • http://www.gorillawalker.com/cherry-lane-15-most-popular-classical-melodies-for-trombone-book.pdf
    • http://www.gorillawalker.com/stabilizing-an-unstable-economy.pdf
    • http://www.gorillawalker.com/101-longeing-and-long-lining-exercises-english-and-western-a.pdf
    • http://www.gorillawalker.com/unstable-equilibrium-eight-russian-poetic-texts-yale-russian-and-east.pdf
    • http://www.gorillawalker.com/apple-pro-training-series-os-x-server-essentials-10-10.pdf
    • http://www.gorillawalker.com/lenten-survival-guide-for-kids-i-am-supposed-to-do.pdf
    • http://www.gorillawalker.com/the-old-world-kitchen-the-rich-tradition-of-european-peasant.pdf
    • http://www.gorillawalker.com/islam-and-the-challenge-of-human-rights.pdf
    • http://www.gorillawalker.com/the-time-bike-hall-family-chronicles.pdf
    • http://www.gorillawalker.com/this-is-a-special-edition-on-expatriation-repatriation-and-outsourcing.pdf
    • http://www.gorillawalker.com/new-york-shopping-guide-2015-best-rated-stores-in-new.pdf
    • http://www.gorillawalker.com/leasehold-reform-housing-and-urban-development-act-1993-text-and.pdf
    • http://www.gorillawalker.com/finnegans-wake-a-symposium.pdf
    • http://www.gorillawalker.com/gibraltar-gb-1-10-000-travel-map-international-travel-maps.pdf
    • http://www.gorillawalker.com/homosexuality-its-nature-and-causes.pdf
    • http://www.gorillawalker.com/collected-papers-volume-2.pdf
    • http://www.gorillawalker.com/new-strategies-in-parasitology-frontiers-of-infectious-diseases-proceedings-of.pdf
    • http://www.gorillawalker.com/inocencia-spanish-edition.pdf
    • http://www.gorillawalker.com/bad-luck-and-trouble-jack-reacher-no-11.pdf
    • http://www.gorillawalker.com/understanding-pharmacology-essentials-for-medication-safety-1e.pdf
    • http://www.gorillawalker.com/a-midsummer-night-s-dream-shakespeare-signet-classic.pdf
    • http://www.gorillawalker.com/injection-molding-processing-data-plastics-pocket-power.pdf
    • http://www.gorillawalker.com/sojourner-an-insider-s-view-of-the-mars-pathfinder-mission.pdf
    • http://www.gorillawalker.com/shaolin-6-close-strike-the-first-set-taught-in-the.pdf
    • http://www.gorillawalker.com/safari-adventure-mega-magnaforms-magnetic-play-set-activity-books.pdf
    • http://www.gorillawalker.com/bad-stuff-in-the-news-a-family-guide-to-handling.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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