Malicious PDF — malware analysis report

Static analysis result for SHA-256 82b9391dfd1e6d21…

MALICIOUS

PDF

41.9 KB Created: 2019-01-06 08:03:02 +03:00 Authoring application: PDFCreator Version 1.5.1 (via GPL Ghostscript 9.05)
MD5: 9c5d0d83f179d24ea2624728380113ee SHA-1: d978da3c44128591f64a90883ae611830b22687d SHA-256: 82b9391dfd1e6d2146fe3fa3204ebe2e3f1a4797d1bd0c688c09330877205170
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, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious. The document body is heavily obfuscated and does not provide clear textual lures, but the sheer volume of links suggests a malicious intent, possibly for SEO manipulation or to distribute further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8872

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/liability-insurance-lloyd-s-insurance-law-library.pdf
    • http://www.gorillawalker.com/explorer-s-guide-maine-sixteenth-edition-explorer-s-complete.pdf
    • http://www.gorillawalker.com/progress-in-thin-layer-chromatography-and-related-methods-v-2.pdf
    • http://www.gorillawalker.com/critical-care-obstetrics.pdf
    • http://www.gorillawalker.com/image-ethics-in-the-digital-age-1st-first-edition.pdf
    • http://www.gorillawalker.com/down-by-the-jetty-the-dr-feelgood-story.pdf
    • http://www.gorillawalker.com/real-science-4-kids-biology-level-1-laboratory-worksheets.pdf
    • http://www.gorillawalker.com/zhong-wai-wei-xing-xiao-shuo-jian-shang-ci-dian.pdf
    • http://www.gorillawalker.com/houston-unleashed.pdf
    • http://www.gorillawalker.com/inanna-lady-of-largest-heart-poems-of-the-sumerian-high.pdf
    • http://www.gorillawalker.com/book-selection-and-censorship-a-study-of-school-and-public.pdf
    • http://www.gorillawalker.com/mummies-tombs-and-treasure-secrets-of-ancient-egypt-vol-1.pdf
    • http://www.gorillawalker.com/creating-affluence-the-a-to-z-steps-to-a-richer.pdf
    • http://www.gorillawalker.com/a-dictionary-of-dates-oxford-paperback-reference.pdf
    • http://www.gorillawalker.com/san-juan-adventure-guide-hiking-biking-and-skiing-in-southwestern.pdf
    • http://www.gorillawalker.com/pathological-lying-accusation-and-swindling-a-study-in-forensic-psychology.pdf
    • http://www.gorillawalker.com/esquisses-senegalaises-french-edition.pdf
    • http://www.gorillawalker.com/the-muslim-brotherhood-hasan-al-hudaybi-and-ideology-routledge-studies.pdf
    • http://www.gorillawalker.com/advocacy-in-the-human-services.pdf
    • http://www.gorillawalker.com/investigations-on-the-theory-of-the-brownian-movement.pdf
    • http://www.gorillawalker.com/why-normandy-was-won-operation-bagration-and-the-war-in.pdf
    • http://www.gorillawalker.com/cardiothoracic-surgery-vademecum.pdf
    • http://www.gorillawalker.com/sesame-beginnings-firsts-sesame-street.pdf
    • http://www.gorillawalker.com/twelve-step-christianity-the-christian-roots-application-of-the-twelve.pdf
    • http://www.gorillawalker.com/cengage-advantage-books-essentials-of-business-law.pdf
    • http://www.gorillawalker.com/trapped-in-time-extinction-kindle-edition.pdf
    • http://www.gorillawalker.com/internet-gaming-law.pdf
    • http://www.gorillawalker.com/gene-expression-systems-using-nature-for-the-art-of-expression.pdf
    • http://www.gorillawalker.com/les-femmes-d-amis-french-edition-kindle-edition.pdf
    • http://www.gorillawalker.com/vehicle-restoration-log-silver-cover-s-m-car-journals.pdf
    • http://www.gorillawalker.com/grieving-the-loss-of-your-pet-how-to-survive-your.pdf
    • http://www.gorillawalker.com/disney-frozen-1000-stickers.pdf
    • http://www.gorillawalker.com/czardas-for-trumpet-piano.pdf
    • http://www.gorillawalker.com/the-chrome-book-fifth-edition-the-essential-guide-to-cloud.pdf
    • http://www.gorillawalker.com/psychoanalytic-perspectives-on-women.pdf
    • http://www.gorillawalker.com/dawson-s-petting-zoo.pdf
    • http://www.gorillawalker.com/olympus-at-war-pegasus.pdf
    • http://www.gorillawalker.com/history-of-the-union-gospel-mission.pdf
    • http://www.gorillawalker.com/martin-de-porres-a-saint-for-our-time.pdf
    • http://www.gorillawalker.com/piano-concerto-no-1-theme-from-the-op-23-accordion.pdf
    • http://www.gorillawalker.com/real-science-4-kids-biology-level-1-laboratory-wo
    • 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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