Malicious PDF — malware analysis report

Static analysis result for SHA-256 efa2610524bfc2d8…

MALICIOUS

PDF

43.5 KB Created: 2018-12-02 10:56:53 +03:00 Authoring application: Acrobat PDFMaker 5.0 for Word (via Acrobat Distiller 5.0 (Windows))
MD5: 4ca4c75dbaf291891beb2cc87d4301c7 SHA-1: 1a23bade09c3a2b7bf9057cd931833c996377396 SHA-256: efa2610524bfc2d82d3199501e82fc9cce096cf0cf7d74acfd51a7d2a3ff1245
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 document 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 0.9007

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/my-guy-barbaro-a-jockey-s-journey-through-love-triumph.pdf
    • http://www.gorillawalker.com/birthdays-in-different-places-learning-about-our-global-community.pdf
    • http://www.gorillawalker.com/dictionary-of-the-middle-ages-13-volume-set.pdf
    • http://www.gorillawalker.com/the-last-word-a-treasury-of-women-s-quotes.pdf
    • http://www.gorillawalker.com/red-brick-in-the-land-of-steady-habits-creating-the.pdf
    • http://www.gorillawalker.com/tobacco-by-2-cells-from-cellular-dynamics-to-omics-biotechnology.pdf
    • http://www.gorillawalker.com/changing-paradigms-the-state-of-the-ethnological-sciences-in-southeast.pdf
    • http://www.gorillawalker.com/calendario-de-las-brujas-2015-spanish-edition.pdf
    • http://www.gorillawalker.com/by-eme-cole-pilates-expanded-supplemental-exercises-to-the-reformer.pdf
    • http://www.gorillawalker.com/eating-on-the-wild-side-the-missing-link-to-optimum.pdf
    • http://www.gorillawalker.com/the-entheological-paradigm-essays-on-the-dmt-and-5-meo.pdf
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    • http://www.gorillawalker.com/japan-s-foreign-and-security-policy-under-the-abe-doctrine.pdf
    • http://www.gorillawalker.com/capitulating-to-the-dragon-capitulation-and-submission-book-5.pdf
    • http://www.gorillawalker.com/the-dorsai-companion.pdf
    • http://www.gorillawalker.com/his-best-friend-s-mom-part-1-2-and-3.pdf
    • http://www.gorillawalker.com/les-plaisirs-d-hiver-french-edition.pdf
    • http://www.gorillawalker.com/on-course-strategies-for-creating-success-in-college-and-in.pdf
    • http://www.gorillawalker.com/the-a-z-of-creative-photography-revised-edition-a-complete.pdf
    • http://www.gorillawalker.com/measure-for-measure-the-arden-shakespeare-second-series-measure-for.pdf
    • http://www.gorillawalker.com/corinna-la-saga-regency-dei-chase-vol-3-italian-edition.pdf
    • http://www.gorillawalker.com/bang-dutch-edition.pdf
    • http://www.gorillawalker.com/when-you-get-older-where-will-you-live-a-practical.pdf
    • http://www.gorillawalker.com/advances-in-chemical-physics-modern-nonlinear-optics-volume-119-part.pdf
    • http://www.gorillawalker.com/food-therapy-the-ultimate-guide-to-conscious-eating.pdf
    • http://www.gorillawalker.com/fear-city-repairman-jack.pdf
    • http://www.gorillawalker.com/demon-slayers.pdf
    • http://www.gorillawalker.com/anxiety-disorders-a-tutorial-study-guide-kindle-edition.pdf
    • http://www.gorillawalker.com/quaternary-carbonate-and-evaporite-sedimentary-facies-and-their-ancient-analogues.pdf
    • http://www.gorillawalker.com/modern-cabinetmaking-workbook.pdf
    • http://www.gorillawalker.com/global-emission-technology-and-analysis-s-p-society-of-automotive.pdf
    • http://www.gorillawalker.com/fundamentals-of-programmable-logic-controllers-and-ladder-logic-volume-1.pdf
    • http://www.gorillawalker.com/the-new-rolling-stone-album-guide.pdf
    • http://www.gorillawalker.com/a-bigger-international-presence-more-manufacturers-from-the-far-east.pdf
    • http://www.gorillawalker.com/geografia-geography-spanish-edition.pdf
    • http://www.gorillawalker.com/othello-barnes-noble-shakespeare.pdf
    • http://www.gorillawalker.com/over-100-delicious-deep-fryer-recipes-how-to-use-your.pdf
    • http://www.gorillawalker.com/lady-of-eve-a-medieval-romance-kindle-edition.pdf
    • http://www.gorillawalker.com/25-fun-phonics-plays-for-beginning-readers-engaging-reproducible-plays.pdf
    • http://www.gorillawalker.com/the-science-of-gardening.pdf
    • http://www.gorillawalker.com/calendario-de-las-brujas-2015-spanish-
    • 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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