Malicious PDF — malware analysis report

Static analysis result for SHA-256 23db14f99def69f9…

MALICIOUS

PDF

41.2 KB Created: 2019-04-08 04:53:23 +03:00 Authoring application: LaTeX with hyperref package (via PDFlib PLOP 2.0.0p6 (SunOS)/Acrobat Distiller 5.0.5 (Windows))
MD5: a3643cdf3b226a3be7333d90247ffce3 SHA-1: e700ad3820ab7bdcc42d2423529412aa7a1b90c9 SHA-256: 23db14f99def69f9875dc1ac996cc1d643692414fd6c4d0860e8a522f76505aa
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF contains a large number of embedded links pointing to external PDF files, a technique 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 0.9181

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/adobe-livecycle-designer-second-edition-creating-dynamic-pdf-and-html5.pdf
    • http://www.gorillawalker.com/requiem-in-full-score-dover-music-scores.pdf
    • http://www.gorillawalker.com/first-word-search-fun-first-words.pdf
    • http://www.gorillawalker.com/intermediate-algebra-eighth-edition.pdf
    • http://www.gorillawalker.com/true-legend.pdf
    • http://www.gorillawalker.com/philippine-localities-and-global-perspectives.pdf
    • http://www.gorillawalker.com/holt-earth-science-new-york-the-physical-setting-student-edition.pdf
    • http://www.gorillawalker.com/nazarbayev-and-the-making-of-kazakhstan-from-communism-to-capitalism.pdf
    • http://www.gorillawalker.com/applications-of-holography-proceedings-of-the-united-states-japan-seminar.pdf
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    • http://www.gorillawalker.com/electrokinetically-driven-microfluidics-and-nanofluidics.pdf
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    • http://www.gorillawalker.com/get-what-you-need.pdf
    • http://www.gorillawalker.com/american-government-the-essentials-student-handbook.pdf
    • http://www.gorillawalker.com/starfish-a-mother-s-recovery-from-addiction.pdf
    • http://www.gorillawalker.com/vladimir-nabokov-poetry-and-the-lyric-voice.pdf
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    • http://www.gorillawalker.com/hey-diddle-diddle-getting-ready-to-read-with-mother-goose.pdf
    • http://www.gorillawalker.com/vulnerability-of-coastal-ecosystems-and-adaptation-iste.pdf
    • http://www.gorillawalker.com/e-t-the-extra-terrestrial-selections-piano-solos.pdf
    • http://www.gorillawalker.com/pendragon-tales-of-mystic-tournament-op-king-arthur-pendragon-2723.pdf
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    • http://www.gorillawalker.com/running-into-trouble-nancy-drew-files-kindle-edition.pdf
    • http://www.gorillawalker.com/nazar
    • 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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