Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4b8763ebae015d2…

MALICIOUS

PDF

41.1 KB Created: 2018-12-15 20:47:30 +03:00 Authoring application: dvips(k) 5.96 Copyright 2005 Radical Eye Software (via GPL Ghostscript 8.57)
MD5: 1fb67d892cb6ecd2cda4e3730fb8b8f2 SHA-1: 52cbc55687836bf90c1e077f1c7463f4c47be54d SHA-256: f4b8763ebae015d23751b9068f32c5df2bad0fbf0b6c6ed834841e020ba9067c
90 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains a large number of embedded links to external PDF files, primarily hosted on 'gorillawalker.com'. This technique is often used for SEO manipulation or to distribute malicious content indirectly. The ML classifier also flagged this PDF as malicious with a high probability. No scripts were extracted, and the document body contained mostly obfuscated or binary data.

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/stanford-law-review-volume-64-issue-3-march-2012-kindle.pdf
    • http://www.gorillawalker.com/blackjack-forum-full-year-1989-volume-ix-issues-1-march.pdf
    • http://www.gorillawalker.com/medical-transcription-projects.pdf
    • http://www.gorillawalker.com/algebra-and-trigonometry-custom-edition-for-florida-international-university.pdf
    • http://www.gorillawalker.com/pure-juicing-for-glowing-skin-immune-boosting-and-recovery-calories.pdf
    • http://www.gorillawalker.com/freedom-s-witness-the-civil-war-correspondence-of-henry-mcneal.pdf
    • http://www.gorillawalker.com/panama-business-intelligence-report.pdf
    • http://www.gorillawalker.com/oceans-our-world.pdf
    • http://www.gorillawalker.com/our-present-duty-concluding-address-to-the-anglo-catholic-conference.pdf
    • http://www.gorillawalker.com/nursing-assistant-ltc-resource.pdf
    • http://www.gorillawalker.com/afghan-bound.pdf
    • http://www.gorillawalker.com/when-september-ends.pdf
    • http://www.gorillawalker.com/global-sustainable-development-and-renewable-energy-systems.pdf
    • http://www.gorillawalker.com/breaking-a-horse-to-harness-a-step-by-step-guide.pdf
    • http://www.gorillawalker.com/the-official-racing-book.pdf
    • http://www.gorillawalker.com/never-always-sometimes.pdf
    • http://www.gorillawalker.com/forecasting-and-time-series-an-applied-approach-the-duxbury-advanced.pdf
    • http://www.gorillawalker.com/horticulture-the-green-world.pdf
    • http://www.gorillawalker.com/a-filosofia-do-punk-mais-do-que-barulho-portuguese-edition.pdf
    • http://www.gorillawalker.com/the-wizard-of-oz-selections.pdf
    • http://www.gorillawalker.com/the-manticore-penguin-classics.pdf
    • http://www.gorillawalker.com/pro-net-2-0-windows-forms-and-custom-controls-in.pdf
    • http://www.gorillawalker.com/holt-allez-viens-student-edition-level-1-2003.pdf
    • http://www.gorillawalker.com/mrs-hill-s-southern-practical-cookery-and-receipt-book-a.pdf
    • http://www.gorillawalker.com/where-the-blood-mixes.pdf
    • http://www.gorillawalker.com/die-kat-kom-kuier-afrikaans-edition.pdf
    • http://www.gorillawalker.com/overkill-a-jaywalker-case.pdf
    • http://www.gorillawalker.com/autumn-rambles-in-north-africa.pdf
    • http://www.gorillawalker.com/las-semanas-del-jardin-destinolibro-spanish-edition-paperback.pdf
    • http://www.gorillawalker.com/bahamian-anthology.pdf
    • http://www.gorillawalker.com/consideraciones-conceptuales-sobre-los-sistemas-de-informaci-n-geogr-fica.pdf
    • http://www.gorillawalker.com/medicinal-coleus-a-remunerative-crop-of-indian-origin.pdf
    • http://www.gorillawalker.com/in-the-temple-of-wolves-a-winter-s-immersion-in.pdf
    • http://www.gorillawalker.com/chinese-silks-the-culture-civilization-of-china.pdf
    • http://www.gorillawalker.com/biological-disaster-management-major-events-and-existing-framework.pdf
    • http://www.gorillawalker.com/nelson-international-mathematics-workbook-2b.pdf
    • http://www.gorillawalker.com/the-viscount-who-loved-me-bridgertons.pdf
    • http://www.gorillawalker.com/exercise-for-special-populations.pdf
    • http://www.gorillawalker.com/aspects-of-old-assyrian-trade-and-its-terminology-ancient-near.pdf
    • http://www.gorillawalker.com/spa-medicine-your-gateway-to-the-ageless-zone.pdf
    • http://www.gorillawalker.com/panama-business
    • 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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