Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0927d5f38821522…

MALICIOUS

PDF

43.6 KB Created: 2018-11-15 18:32:07 +03:00 Authoring application: Adobe InDesign CC 2017 (Macintosh) (via Adobe PDF Library 15.0)
MD5: 5aa3f5fcdeb168efc591ce1294dd7567 SHA-1: 7c4728fa47b490e679f09a7bafefd671f5e39c4b SHA-256: f0927d5f3882152209e528528312608151b0ac47460b5bdb24dca65f21b57ba8
90 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and contains a large number of external links, indicating a link farm. The primary heuristic identified a mass of external PDF links, with the first URL being http://www.gorillawalker.com/electrochemistry-v-6.pdf. This suggests the document's purpose is to drive traffic to these external resources, likely for SEO manipulation or to distribute other malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8683

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/electrochemistry-v-6.pdf
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    • http://www.gorillawalker.com/the-numerical-treatment-of-differential-equations-grundlehren-der-mathematischen-wissenschaften.pdf
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    • http://www.gorillawalker.com/mars-the-grand-tour-book-4.pdf
    • http://www.gorillawalker.com/play-hive-like-a-champion-second-edition-strategy-tactics-and.pdf
    • http://www.gorillawalker.com/soup-van-stories-over-a-polystyrene-cup.pdf
    • http://www.gorillawalker.com/leaves-from-our-tuscan-kitchen-or-how-to-cook-vegetables.pdf
    • http://www.gorillawalker.com/a-growing-suspicion-a-rebecca-mystery-american-girl-rebecca-mysteries.pdf
    • http://www.gorillawalker.com/human-nature-a-reader-hackett-readings-in-philosophy.pdf
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    • http://www.gorillawalker.com/constructing-east-asia-technology-ideology-and-empire-in-japan-s.pdf
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    • http://www.gorillawalker.com/promiseland-the-journal-of-callie-mcgregor-series-book-1-journals.pdf
    • http://www.gorillawalker.com/1-2-kings-brazos-theological-commentary-on-the-bible.pdf
    • http://www.gorillawalker.com/studyguide-for-inorganic-chemistry-by-wulfsberg-gary-isbn-9781891389016.pdf
    • http://www.gorillawalker.com/how-to-draw-the-life-and-times-of-james-buchanan.pdf
    • http://www.gorillawalker.com/diccionario-moderno-aleman-spanish-edition.pdf
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    • http://www.gorillawalker.com/dusk-a-classic-modern-horror-prequel-to-blood-revised-by.pdf
    • http://www.gorillawalker.com/imperfect-endings-a-daughter-s-story-of-love-loss-and.pdf
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    • http://www.gorillawalker.com/the-american-yoga-association-beginner-s-manual-fully-revised-and.pdf
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    • http://www.gorillawalker.com/not-even-a-hint-a-study-guide-for-men.pdf
    • 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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