Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b6fb06c818b1325…

MALICIOUS

PDF

42.9 KB Created: 2019-03-16 18:14:04 +03:00 Authoring application: Adobe InDesign CS5 (7.0.5) (via Adobe PDF Library 9.9)
MD5: d2abc2bfd37afb758b6b96c9cc0e5342 SHA-1: 0d275c1190db968841ab23984ee4897e9f1e0a9b SHA-256: 4b6fb06c818b1325cc62b355bfe7a43b2d45a8a63c479ad568b2b2787716a485
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, primarily hosted on www.gorillawalker.com. This technique is often used to distribute malicious content or to engage in SEO poisoning to drive traffic to malicious sites. No scripts were extracted from this sample, and the document body was heavily obfuscated. The ML classifier strongly indicated maliciousness.

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/ricky-hatton-the-real-hitman-the-official-fly-on-the.pdf
    • http://www.gorillawalker.com/sendas-literarias-level-2.pdf
    • http://www.gorillawalker.com/exit-strategy-how-to-leave-that-toxic-relationship-reclaim-your.pdf
    • http://www.gorillawalker.com/the-mr-porter-paperback-the-manual-for-a-stylish-life.pdf
    • http://www.gorillawalker.com/coaches-manual-level-i-national-coaching-certification-program.pdf
    • http://www.gorillawalker.com/big-kids-coloring-book-zendalas-zentangled-mandalas.pdf
    • http://www.gorillawalker.com/the-bible-among-the-myths-unique-revelation-or-just-ancient.pdf
    • http://www.gorillawalker.com/chemistry-the-molecular-nature-of-matter-and-change-4th.pdf
    • http://www.gorillawalker.com/hospital-information-systems-the-next-generation.pdf
    • http://www.gorillawalker.com/ficciones-english-translation-unabridged-paperback.pdf
    • http://www.gorillawalker.com/english-grammar-punctuation-quick-study-academic.pdf
    • http://www.gorillawalker.com/top-ten-sights-seoul-kindle-edition.pdf
    • http://www.gorillawalker.com/nursing-home-care-in-the-united-states-failure-in-public.pdf
    • http://www.gorillawalker.com/the-magus-of-java-teachings-of-an-authentic-taoist-immortal.pdf
    • http://www.gorillawalker.com/practical-cookery-book-and-dynamic-learning-dvd.pdf
    • http://www.gorillawalker.com/mega-book-of-combat-aircraft-mega-books-series.pdf
    • http://www.gorillawalker.com/the-initiation-welcome-to-the-squad-cheerleader-interacial-gangbang.pdf
    • http://www.gorillawalker.com/worldshaker.pdf
    • http://www.gorillawalker.com/tarkin-star-wars-unabridged-audible-audio-edition.pdf
    • http://www.gorillawalker.com/poems-of-places-england-and-wales.pdf
    • http://www.gorillawalker.com/cim-post-graduate-diploma-level-assessment-workbook.pdf
    • http://www.gorillawalker.com/fixed.pdf
    • http://www.gorillawalker.com/urban-hymns-piano-vocal-guitar.pdf
    • http://www.gorillawalker.com/april-fools-rules-two-of-a-kind-no-22.pdf
    • http://www.gorillawalker.com/caught-in-a-trap-romantic-comedy-unabridged-audible-audio-edition.pdf
    • http://www.gorillawalker.com/meridian.pdf
    • http://www.gorillawalker.com/patagonian-fuegian-channels-waterproof-map-chilean-fjords-cruise-chart-cape.pdf
    • http://www.gorillawalker.com/reprint-hanson-harry-d-harry-dennett-practice-of-equine-medicine.pdf
    • http://www.gorillawalker.com/lettre-au-president-bouteflika-sur-le-retour-des-pieds-noirs.pdf
    • http://www.gorillawalker.com/natural-remedies-for-goat-diseases-natural-remedies-for-animals-series.pdf
    • http://www.gorillawalker.com/one-more-step-along-the-way.pdf
    • http://www.gorillawalker.com/state-led-privatisation-and-the-demise-of-the-democratic-state.pdf
    • http://www.gorillawalker.com/letter-of-the-secretary-of-war-to-hon-henry-wilson.pdf
    • http://www.gorillawalker.com/unlikely-people.pdf
    • http://www.gorillawalker.com/vocal-awareness.pdf
    • http://www.gorillawalker.com/tarkovsky-cinema-as-poetry.pdf
    • http://www.gorillawalker.com/power-basics-united-states-history-test-pack.pdf
    • http://www.gorillawalker.com/fundamental-mathematics.pdf
    • http://www.gorillawalker.com/cambridge-igcse-core-english-as-a-second-language-coursebook-with.pdf
    • http://www.gorillawalker.com/the-10-minute-marketer-s-secret-formula.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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