Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c1a410a5772e6fa…

MALICIOUS

PDF

41.5 KB Created: 2018-12-15 20:06:47 +03:00 Authoring application: Windows PSCRIPT (via Acrobat Distiller 3.01 for Windows)
MD5: ae498fdbb8f80184b7ffd0a97d12eb1d SHA-1: c5a0899e14a0882508f043e6febfd4e890e4d51e SHA-256: 8c1a410a5772e6fac7a0f6395da0072c3140c9e51b4fe5127de4c819c5def2af
90 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains a large number of external links, indicating a link farm. The primary heuristic identified a 'PDF_SEO_LINK_FARM' which suggests the document's purpose is to host numerous links, likely leading to malicious content or phishing sites. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

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/the-master-photographer-s-lith-printing-course-a-definitive-guide.pdf
    • http://www.gorillawalker.com/workbook-for-bennett-s-heavy-duty-truck-systems-6th.pdf
    • http://www.gorillawalker.com/hunting-night-sons-of-the-wolf.pdf
    • http://www.gorillawalker.com/you-re-still-their-dad-fathering-your-adult-children.pdf
    • http://www.gorillawalker.com/organic-synthesis-oxford-chemistry-primers-31.pdf
    • http://www.gorillawalker.com/chemistry-of-plant-phosphorus-compounds.pdf
    • http://www.gorillawalker.com/modeling-hydrologic-change-statistical-methods.pdf
    • http://www.gorillawalker.com/done-deal-billionaire-bwwm-interracial-erotic-romance-kindle-edition.pdf
    • http://www.gorillawalker.com/spoilt-rotten-the-toxic-cult-of-sentimentality.pdf
    • http://www.gorillawalker.com/livelihoods-grow-in-gardens-fao-diversification-booklets.pdf
    • http://www.gorillawalker.com/hplc-of-peptides-and-proteins-methods-and-protocols-methods-in.pdf
    • http://www.gorillawalker.com/ktpa-mcat-organic-chemistry.pdf
    • http://www.gorillawalker.com/the-thunder-lord-the-de-shera-brotherhood.pdf
    • http://www.gorillawalker.com/harley-davidson-a-history-of-the-world-s-most-famous.pdf
    • http://www.gorillawalker.com/soloing-techniques-for-electric-guitar.pdf
    • http://www.gorillawalker.com/development-of-a-project-purchasing-information-system.pdf
    • http://www.gorillawalker.com/applied-qualitative-research-design-a-total-quality-framework-approach.pdf
    • http://www.gorillawalker.com/sharing-ms-multiple-sclerosis-remarkable-women.pdf
    • http://www.gorillawalker.com/portland-hikes-day-kides-in-oregon-and-washington-within-100.pdf
    • http://www.gorillawalker.com/stew.pdf
    • http://www.gorillawalker.com/network-student-book-multipack-3a.pdf
    • http://www.gorillawalker.com/vodka-classified-a-vodka-lover-s-companion.pdf
    • http://www.gorillawalker.com/principles-of-igneous-and-metamorphic-petrology-2nd-edition-print-replica.pdf
    • http://www.gorillawalker.com/the-europa-world-of-learning-2016.pdf
    • http://www.gorillawalker.com/colecci-n-documental-de-la-independencia-del-peru-volume-3.pdf
    • http://www.gorillawalker.com/the-colosseum-great-building-feats.pdf
    • http://www.gorillawalker.com/let-s-learn-about-mexico-activity-and-coloring-book-dover.pdf
    • http://www.gorillawalker.com/social-security-and-state-benefits-a-practical-guide.pdf
    • http://www.gorillawalker.com/problems-of-dostoevsky-s-poetics-theory-history-of-literature.pdf
    • http://www.gorillawalker.com/amore-e-cappuccino-book-italian-edition.pdf
    • http://www.gorillawalker.com/hoyle-s-rules-of-the-game-descriptions-of-indoor-games.pdf
    • http://www.gorillawalker.com/nixon-s-piano-presidents-and-racial-politics-from-washington-to.pdf
    • http://www.gorillawalker.com/mediation.pdf
    • http://www.gorillawalker.com/colonial-capital-theory-at-work-the-case-of-jamaica.pdf
    • http://www.gorillawalker.com/unix-system-security-a-guide-for-users-and-system-administrators.pdf
    • http://www.gorillawalker.com/world-english-middle-east-edition-2-real-people-real-places.pdf
    • http://www.gorillawalker.com/kummer-f-a-three-duets-op-22-two-cellos-edited.pdf
    • http://www.gorillawalker.com/comiendo-sonrisas-a-solas-spanish-edition.pdf
    • http://www.gorillawalker.com/the-iron-ladies-why-do-women-vote-tory.pdf
    • http://www.gorillawalker.com/abyss-mcgarvey.pdf
    • http://www.gorillawalker.com/modeling-hydrologic-change-statist
    • 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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_001_off00000bf3.js
bb59f39017b323d20c50316bfc2f00161311e313a641ccda02e7e602e2ed97a1		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xBF3 16675 bytes

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