Malicious PDF — malware analysis report

Static analysis result for SHA-256 c911862f1ed58cb9…

MALICIOUS

PDF

43.3 KB Created: 2018-12-14 20:07:04 +03:00 Authoring application: DocBook XSL Stylesheets with Apache FOP (via Apache FOP Version 2.1)
MD5: 7e4b0f03ca8ca18716a8fa70e162a1bd SHA-1: 9c4dbadc25f6fa2fed44f55a96ae3d6c474fb331 SHA-256: c911862f1ed58cb9f7d6f8dbc4c481c1a49b60446b01922f69a417dd4f2174a7
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links pointing to external PDF files, a technique often used for SEO manipulation or to distribute malware. The ML classifier also flagged this PDF as malicious. No scripts were extracted from this sample, and the document body was heavily obfuscated, preventing a deeper analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9171

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/heartless-a-shieldmaiden-s-voice-a-covenant-keeper-novel-volume.pdf
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    • http://www.gorillawalker.com/unruly-immigrants-rights-activism-and-transnational-south-asian-politics-in.pdf
    • http://www.gorillawalker.com/package-explorations-an-introduction-to-astronomy-with-connect-plus-access.pdf
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    • http://www.gorillawalker.com/the-stephen-king-companion.pdf
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    • http://www.gorillawalker.com/2013-us-calendar-daily-planner-and-organizer-websites-and-more.pdf
    • http://www.gorillawalker.com/fetish-fair-pick-your-path-novella.pdf
    • http://www.gorillawalker.com/palestine-and-syria-with-routes-through-mesopotamia-and-babylonia-and.pdf
    • http://www.gorillawalker.com/chemical-engineering-series-plant-design-3rd-e.pdf
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    • http://www.gorillawalker.com/fu-huo-de-qun-xiang-taiwan-san-shi-nian-dai.pdf
    • http://www.gorillawalker.com/estrela-em-busca-do-amor-eterno-a-eternidade-n.pdf
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    • http://www.gorillawalker.com/girl-game-lustful-lesbians-first-time-seduction-erotica.pdf
    • http://www.gorillawalker.com/black-hole-astrophysics-the-engine-paradigm-springer-praxis-books.pdf
    • http://www.gorillawalker.com/purple-ronnie-s-reasons-why-you-re-a-super-dad.pdf
    • http://www.gorillawalker.com/the-eternal-husband-and-other-stories-modern-library-classics.pdf
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    • http://www.gorillawalker.com/farewell-to-reality-how-modern-physics-has-betrayed-the-search.pdf
    • http://www.gorillawalker.com/lux-s-practical-erotica-adventure-a-tuesday-erotica-club-novel.pdf
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    • 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/