Malicious PDF — malware analysis report

Static analysis result for SHA-256 b83f1dc4a7938c75…

MALICIOUS

PDF

43.7 KB Created: 2018-11-14 11:22:42 +03:00 Authoring application: PDFCreator Version 0.9.8 (via GPL Ghostscript 8.64)
MD5: 38f51dd2ec841363af42f6fceb832f51 SHA-1: 17114927ae82232a901e9534a17a552b318d8d1c SHA-256: b83f1dc4a7938c751474f06a62231816bd2b8c1023012a38f5399c1563437155
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to external PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML_NYX_PDF_MALICIOUS classifier also flagged this file with high confidence. The document body is heavily obfuscated and unreadable, but the presence of numerous links to external PDFs on the same domain suggests a link farm or distribution mechanism. No scripts were extracted from this sample.

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/nutritional-foundations-and-clinical-applications-pageburst-e-book-on-kno.pdf
    • http://www.gorillawalker.com/xin-yi-ji-zhong-san-ji-hardback-traditional-chinese.pdf
    • http://www.gorillawalker.com/blueberry-smoothie-recipes-rich-in-vitamins-and-antioxidants-boot-health.pdf
    • http://www.gorillawalker.com/the-conversation-train-a-visual-approach-to-conversation-for-children.pdf
    • http://www.gorillawalker.com/systematic-theology-vol-1-the-living-god.pdf
    • http://www.gorillawalker.com/a-textbook-on-edta-chelation-therapy-second-edition-2-sub.pdf
    • http://www.gorillawalker.com/discoredia.pdf
    • http://www.gorillawalker.com/eucalypts-a-bushwalker-s-guide-from-newcastle-to-wollongong-bush.pdf
    • http://www.gorillawalker.com/you-re-hired-total-job-search-second-edition-cvs-interview.pdf
    • http://www.gorillawalker.com/tsutsumi-chunagon-monogatari-mumyo-zoshi-kanyaku-nihon-no-koten-japanese.pdf
    • http://www.gorillawalker.com/changes-between-asce-7-05-and-asce-7-10-skga.pdf
    • http://www.gorillawalker.com/thermal-imaging-cameras-characteristics-and-performance.pdf
    • http://www.gorillawalker.com/grandma-mooned-the-forest-ranger-nevertheless.pdf
    • http://www.gorillawalker.com/a-bean-s-life-watch-it-grow.pdf
    • http://www.gorillawalker.com/an-embroiderers-garden-floral-collection-for-hand-embroidery.pdf
    • http://www.gorillawalker.com/the-world-between-two-covers-reading-the-globe-kindle-edition.pdf
    • http://www.gorillawalker.com/assessing-online-learning-readiness-perceptions-of-distance-learning-stakeholders-in.pdf
    • http://www.gorillawalker.com/harcourt-social-studies-student-edition-grade-4-states-and-regions.pdf
    • http://www.gorillawalker.com/the-expansion-of-wahhabi-power-in-arabia-1798-1932-8.pdf
    • http://www.gorillawalker.com/will-jones-space-adventures-and-the-money-formula-easyread-large.pdf
    • http://www.gorillawalker.com/soulfire-the-plantation.pdf
    • http://www.gorillawalker.com/freddie-mercury-the-definitive-biography.pdf
    • http://www.gorillawalker.com/a-short-history-of-rudeness-manners-morals-and-misbehavior-in.pdf
    • http://www.gorillawalker.com/decision-making-under-uncertainty-cognitive-decision-research-social-interaction-development.pdf
    • http://www.gorillawalker.com/textbook-of-lithology.pdf
    • http://www.gorillawalker.com/when-storms-come-will-you-be-ready.pdf
    • http://www.gorillawalker.com/tainted-love-god-sex-relationships-for-the-not-so-pure.pdf
    • http://www.gorillawalker.com/life.pdf
    • http://www.gorillawalker.com/atlantis-the-missing-continent.pdf
    • http://www.gorillawalker.com/modern-power-station-practice-station-operation-and-maintenance.pdf
    • http://www.gorillawalker.com/letters-from-gallipoli.pdf
    • http://www.gorillawalker.com/california-desert-byways-68-of-california-s-best-backcountry-drives.pdf
    • http://www.gorillawalker.com/a-deadly-drive-the-miramichi-experience-during-the-great-war.pdf
    • http://www.gorillawalker.com/representations-and-cohomology-volume-1-basic-representation-theory-of-finite.pdf
    • http://www.gorillawalker.com/roman-art-romulus-to-constantine-4th-edition.pdf
    • http://www.gorillawalker.com/damaged-goods.pdf
    • http://www.gorillawalker.com/demarcaciones-espectrales-ghostly-demarcations-en-torno-a-espectros-de-marx.pdf
    • http://www.gorillawalker.com/night-season-the-world-of-the-lupi-book-4.pdf
    • http://www.gorillawalker.com/anne-frank-unbound-media-imagination-memory-the-modern-jewish-experience.pdf
    • http://www.gorillawalker.com/the-gondoliers-full-score-a2456.pdf
    • http://www.gorillawalker.com/systemati
    • 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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