Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ded5bc185a81694…

MALICIOUS

PDF

31.9 KB Created: 2019-09-08 11:54:04 +03:00 Authoring application: - (via Acrobat Distiller 2.0 for Macintosh)
MD5: 0c2ba24dfb4287a5cafc45eed8225465 SHA-1: fa0aec045a61283147b962b4e9ea02a2d2617edd SHA-256: 4ded5bc185a81694111b0b3312236ddf335f65d67a28f0c4f8ff7e3bb122cffc
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Phishing: Spearphishing Attachment T1204.002 Malicious File: User Execution

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 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 poisoning or to distribute further payloads. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8447

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/tokyo-journal-volume-32-issue-271.pdf
    • http://www.gorillawalker.com/releasing-the-power-of-the-prophetic-a-practical-guide-to.pdf
    • http://www.gorillawalker.com/imp-and-biscuit-the-fortunes-of-two-pugs.pdf
    • http://www.gorillawalker.com/biologia-biology-la-unidad-y-diversidad-de-la-vida-spanish.pdf
    • http://www.gorillawalker.com/california-stem-student-crossword-puzzles-grades-5-12.pdf
    • http://www.gorillawalker.com/dancers-wonder-books-level-1-careers.pdf
    • http://www.gorillawalker.com/or-perish-in-the-attempt-wilderness-medicine-in-the-lewis.pdf
    • http://www.gorillawalker.com/the-westminster-historical-atlas-to-the-bible-westminster-aids-to.pdf
    • http://www.gorillawalker.com/10-little-monkeys-poke-a-dot.pdf
    • http://www.gorillawalker.com/studies.pdf
    • http://www.gorillawalker.com/lesourdsville-lake-amusement-park-images-of-america-series.pdf
    • http://www.gorillawalker.com/cognitive-model-optimization-with-parallel-genetic-algorithms-investigating-individual-differences.pdf
    • http://www.gorillawalker.com/oscar-wilde-s-decorated-books-editorial-theory-and-literary-criticism.pdf
    • http://www.gorillawalker.com/the-whole-armor-the-truth-about-lies-kindle-edition.pdf
    • http://www.gorillawalker.com/peace-a-world-history.pdf
    • http://www.gorillawalker.com/there-s-only-one-way-to-win-modern-success-principles.pdf
    • http://www.gorillawalker.com/an-introduction-to-partial-differential-equations-with-matlab-chapman-hall.pdf
    • http://www.gorillawalker.com/me-inspira-la-naturaleza-spanish-edition.pdf
    • http://www.gorillawalker.com/blood-the-maddie-trilogy-kindle-edition.pdf
    • http://www.gorillawalker.com/how-to-search-for-a-pastor-in-todays-church.pdf
    • http://www.gorillawalker.com/animal-signs-a-first-book-of-sign-language.pdf
    • http://www.gorillawalker.com/sex-and-sunsets-a-novel.pdf
    • http://www.gorillawalker.com/bonhoeffer-and-interpretive-theory-essays-on-methods-and-understanding-international.pdf
    • http://www.gorillawalker.com/a-box-of-bees.pdf
    • http://www.gorillawalker.com/husbands-and-fathers-re-discover-the-creator-s-purpose-for.pdf
    • http://www.gorillawalker.com/educare-alla-sessualit.pdf
    • http://www.gorillawalker.com/structure-and-properties-of-ionomers-nato-science-series-c.pdf
    • http://www.gorillawalker.com/cutting-edge-internal-auditing.pdf
    • http://www.gorillawalker.com/la-vida-el-pensamiento-y-la-obra-del-escritor-y.pdf
    • http://www.gorillawalker.com/flame-of-recca-vol-27.pdf
    • http://www.gorillawalker.com/breeze-easy-method-for-french-horn-bk-1-cassette-breeze.pdf
    • http://www.gorillawalker.com/paul-mccartney-composer-artist.pdf
    • http://www.gorillawalker.com/the-magical-world-of-the-inklings.pdf
    • http://www.gorillawalker.com/what-s-wrong-with-sociology.pdf
    • http://www.gorillawalker.com/soviet-virology.pdf
    • http://www.gorillawalker.com/leicester-wall-calendar-2016-art-calendar.pdf
    • http://www.gorillawalker.com/iso-13232-2-2005-motorcycles-test-and-analysis-procedures-for.pdf
    • http://www.gorillawalker.com/los-angeles-s-olvera-street-images-of-america-california-images.pdf
    • http://www.gorillawalker.com/london-under-london-a-subterranean-guide.pdf
    • http://www.gorillawalker.com/management-and-cost-accounting-with-myaccountinglab.pdf
    • http://www.gorillawalker.com/lesourdsville-lake-amusement-park-images-of-america-series.pd
    • 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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