Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5dc239418fcd8f2…

MALICIOUS

PDF

43.2 KB Created: 2018-12-02 10:56:16 +03:00 Authoring application: Acrobat PDFMaker 10.1 для Word (via Adobe PDF Library 10.0)
MD5: f91907113d463c64014ff295062c1472 SHA-1: c23ec87dd682db34b1a8a46f9dbfb7dcfe7116c7 SHA-256: e5dc239418fcd8f248c8ca856d26b891c7c9ed96abe2fe3d4814629fc8a5d58a
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.8859

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/fast-and-fancy-revolver-shooting.pdf
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    • http://www.gorillawalker.com/the-growth-and-development-of-quaker-testimony-1652-1661-and.pdf
    • http://www.gorillawalker.com/pre-ged-skill-books-student-edition-language-arts-writing-grammar.pdf
    • http://www.gorillawalker.com/doing-development-research.pdf
    • http://www.gorillawalker.com/whiskey-in-italy-to-2015-databook-download-pdf-digital.pdf
    • http://www.gorillawalker.com/packed-by-my-professor-bwwm-interracial-erotic-romance-kindle-edition.pdf
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    • http://www.gorillawalker.com/adams-the-pilot.pdf
    • http://www.gorillawalker.com/manual-de-avionica-spanish-edition.pdf
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    • http://www.gorillawalker.com/adoption-law-theory-policy-and-practice-second-edition.pdf
    • http://www.gorillawalker.com/cork-limerick-irish-discovery-maps-series.pdf
    • http://www.gorillawalker.com/elementally-priceless-a-rylee-adamson-novella-0-5-kindle-edition.pdf
    • http://www.gorillawalker.com/terpsichore-in-sneakers-post-modern-dance-wesleyan-paperback.pdf
    • http://www.gorillawalker.com/the-art-of-national-geographic.pdf
    • http://www.gorillawalker.com/albert-the-great-the-albert-puj
    • 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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