Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c3f79f91b351b2d…

MALICIOUS

PDF

44.0 KB Created: 2018-12-14 21:24:38 +03:00 Authoring application: Word (via Mac OS X 10.8.5 Quartz PDFContext)
MD5: 16be22cda8d399c3365cfee5d9b445d5 SHA-1: fcc89d25be6e997a8e7d972e232e1a8c7f8555c1 SHA-256: 6c3f79f91b351b2da6b9c8f5b34ca142025eb357d0645124441d3467a9c723a0
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO manipulation or to distribute further malicious content. The ML classifier also flagged this PDF as malicious. While no specific script was directly analyzed for malicious intent, the presence of embedded JavaScript and the overall structure strongly suggest a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8859

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/bricks-to-riches-how-to-sell-lego-online.pdf
    • http://www.gorillawalker.com/this-one-is-mine-a-novel.pdf
    • http://www.gorillawalker.com/mark-twain-just-the-facts-biographies.pdf
    • http://www.gorillawalker.com/forms-folds-and-sizes-second-edition-all-the-details-graphic.pdf
    • http://www.gorillawalker.com/thailand-black-book-a-survival-guide-asia-survival-guides-1.pdf
    • http://www.gorillawalker.com/musher-s-night-before-christmas-the-night-before-christmas-series.pdf
    • http://www.gorillawalker.com/decid-decirte-adios-aprende-a-darte-el-valor-que-te.pdf
    • http://www.gorillawalker.com/dynamic-soa-and-bpm-best-practices-for-business-process-management.pdf
    • http://www.gorillawalker.com/daybook-of-critical-reading-and-writing-student-book-5-pack.pdf
    • http://www.gorillawalker.com/powerful-medical-device-sales-5-user.pdf
    • http://www.gorillawalker.com/kjv-rainbow-study-bible-jacketed-hardcover-indexed.pdf
    • http://www.gorillawalker.com/trumpet-tune-sheet-music.pdf
    • http://www.gorillawalker.com/joe-pass-guitar-method.pdf
    • http://www.gorillawalker.com/cognitive-neuroscience-psy-381-physiological-psychology.pdf
    • http://www.gorillawalker.com/si-no-despierto-spanish-edition.pdf
    • http://www.gorillawalker.com/seek-151-summer-2015-the-abundant-life-standard-lesson-resources.pdf
    • http://www.gorillawalker.com/negotiating-trade-liberalization-at-the-wto-domestic-politics-and-bargaining.pdf
    • http://www.gorillawalker.com/gold-rush-widows-of-little-falls-a-story-drawn-from.pdf
    • http://www.gorillawalker.com/the-book-of-angels.pdf
    • http://www.gorillawalker.com/the-hong-kong-visitor-s-book-a-historical-who-s.pdf
    • http://www.gorillawalker.com/flipping-leadership-doesn-t-mean-reinventing-the-wheel-corwin-connected.pdf
    • http://www.gorillawalker.com/words-to-live-by-2015-weekly-engagement-calendar.pdf
    • http://www.gorillawalker.com/the-gender-inclusive-movement-among-churches-of-christ.pdf
    • http://www.gorillawalker.com/man-s-natural-predator.pdf
    • http://www.gorillawalker.com/grandi-capolavori-per-clarinetto-pezzi-facili-di-bach-beethoven-brahms.pdf
    • http://www.gorillawalker.com/writing-technology-in-meiji-japan-a-media-history-of-modern.pdf
    • http://www.gorillawalker.com/meet-me-at-ray-s-a-celebration-of-ray-s.pdf
    • http://www.gorillawalker.com/stealing-power-a-powerful-psychological-crime-thriller-a-detective-india.pdf
    • http://www.gorillawalker.com/the-complexity-of-connection-writings-from-the-stone-center-s.pdf
    • http://www.gorillawalker.com/change-your-brain-change-your-body-use-your-brain-to.pdf
    • http://www.gorillawalker.com/latinos-and-politics-a-select-research-bibliography-center-for-mexican.pdf
    • http://www.gorillawalker.com/amazing-spider-man-vol-5-spiral.pdf
    • http://www.gorillawalker.com/cartae-capitulorum-generalium-1621-1665-rijksarchief-te-brugge-analecta-cartusiana.pdf
    • http://www.gorillawalker.com/physik-des-ultraschalls-grundlagen-german-edition.pdf
    • http://www.gorillawalker.com/everyday-evidence-a-practical-approach.pdf
    • http://www.gorillawalker.com/fern-the-green-fairy-rainbow-magic-the-rainbow-fairies-no.pdf
    • http://www.gorillawalker.com/bgp4-inter-domain-routing-in-the-internet.pdf
    • http://www.gorillawalker.com/recorder-from-the-beginning-playing-score.pdf
    • http://www.gorillawalker.com/cost-effective-diagnostic-imaging-the-clinician-s-guide-4e.pdf
    • http://www.gorillawalker.com/brigid-beware-a-first-stepping-stone-book-a-stepping-stone.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_001_off00000d60.js
6b07cce550fd713721e8a867fb36496fdd25bd2b910474db35c02fe9e87ad1f0		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD60 16012 bytes

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