Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c92c6570e7d8de6…

MALICIOUS

PDF

43.4 KB Created: 2019-04-07 18:03:30 +03:00 Authoring application: TopLeaf 7.6.056 (via iText 2.1.7 by 1T3XT)
MD5: 00459dfade1995b795db2bdff0461f4c SHA-1: 5b64a7ae84cc3d9e45bcb3720f083095af89fd5c SHA-256: 9c92c6570e7d8de65cd494e726381193be15ff28826d22ddbf1ae8708c18f291
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged the document as malicious. While no scripts were extracted, the sheer volume of links suggests an attempt to manipulate search engine results or distribute a large number of potentially malicious documents. The attack pattern is likely a form of SEO abuse or a link distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9016

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/differential-forms-and-applications-universitext.pdf
    • http://www.gorillawalker.com/drawing-in-silver-and-gold-leonardo-to-jasper-johns.pdf
    • http://www.gorillawalker.com/the-power-of-who-you-already-know-everyone-you-need.pdf
    • http://www.gorillawalker.com/stop-the-next-war-now-inner-ocean-action-guide.pdf
    • http://www.gorillawalker.com/the-best-mono-cure.pdf
    • http://www.gorillawalker.com/discovering-the-holy-spirit-in-the-new-testament.pdf
    • http://www.gorillawalker.com/six-feet-of-the-country.pdf
    • http://www.gorillawalker.com/the-naughtiest-girl-helps-a-friend.pdf
    • http://www.gorillawalker.com/means-construction-cost-index-october-2008-means-construction-cost-indexes.pdf
    • http://www.gorillawalker.com/the-art-of-digital-music-56-visionary-artists-and-insiders.pdf
    • http://www.gorillawalker.com/mandalas-of-the-bon-religion-bon-studies-1-tibetan-edition.pdf
    • http://www.gorillawalker.com/the-digital-negative-raw-image-processing-in-lightroom-camera-raw.pdf
    • http://www.gorillawalker.com/how-to-live-life-laughing.pdf
    • http://www.gorillawalker.com/foundations-of-athletic-training-sports-injury-management-anderson.pdf
    • http://www.gorillawalker.com/six-ideas-that-shaped-physics-unit-r-laws-of-physics.pdf
    • http://www.gorillawalker.com/the-ocean-the-bird-and-the-scholar.pdf
    • http://www.gorillawalker.com/the-tao-of-cricket.pdf
    • http://www.gorillawalker.com/a-brit-s-really-helpful-guide-to-orlando-florida-and.pdf
    • http://www.gorillawalker.com/gahan-wilson-s-out-there.pdf
    • http://www.gorillawalker.com/operation-nexus-one-the-relic-hunters-book-2.pdf
    • http://www.gorillawalker.com/the-ruler-who-serves.pdf
    • http://www.gorillawalker.com/an-introduction-to-management-science-quantitative-approaches-to-decision-making.pdf
    • http://www.gorillawalker.com/quick-start-for-selling-on-amazon-successful-selling-in-30.pdf
    • http://www.gorillawalker.com/operation-mayhem.pdf
    • http://www.gorillawalker.com/law-for-the-construction-industry-chartered-institute-of-building.pdf
    • http://www.gorillawalker.com/mother-nurture-life-lessons-from-the-mothers-of-america-s.pdf
    • http://www.gorillawalker.com/died-on-the-fourth-of-july-remembering-the-men-who.pdf
    • http://www.gorillawalker.com/bowties-of-the-fifties.pdf
    • http://www.gorillawalker.com/prayers-promises-and-devotions-for-the-holy-souls-in-purgatory.pdf
    • http://www.gorillawalker.com/igloo-native-american-homes.pdf
    • http://www.gorillawalker.com/industry-structure-strategy-and-public-policy.pdf
    • http://www.gorillawalker.com/bigfoot-the-true-story-of-apes-in-america-kindle-edition.pdf
    • http://www.gorillawalker.com/student-lab-notebook-100-top-bound-carbonless-duplicate-sets.pdf
    • http://www.gorillawalker.com/civil-procedure-before-trial-chapters-1-7.pdf
    • http://www.gorillawalker.com/dark-romance-sexuality-in-the-horror-film-mcfarland-classics.pdf
    • http://www.gorillawalker.com/the-physician-s-guide-to-type-ii-diabetes-niddm.pdf
    • http://www.gorillawalker.com/mi-padre-mi-hijo-my-father-my-son-vinculos-spanish.pdf
    • http://www.gorillawalker.com/casting-crowns-lifesong-easy-piano-paperback.pdf
    • http://www.gorillawalker.com/privacy-big-data-and-the-public-good-frameworks-for-engagement.pdf
    • http://www.gorillawalker.com/psionics-augmented-mythic-psionics.pdf
    • http://www.gorillawalke
    • 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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