Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aa8e60d2ad4b3a7…

MALICIOUS

PDF

32.5 KB Created: 2020-04-12 10:56:17 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a643e69f93c86a90bff9a77aefefad05 SHA-1: 2bff9e9e5610e346f91457f813cc48f925491767 SHA-256: 9aa8e60d2ad4b3a73e8d2bebef204175fb3c976d03995408b15f3854ac5d7e1a
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, many of which point to other PDF files hosted on various domains. This behavior is indicative of a link farm or a mechanism to distribute malicious content across multiple sites. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 3

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://honestfarms.net/uploads/1/3/0/3/130324236/130324236.html#how+to+stick+vinyl+to+painted+wood
    • http://tenuretrackhelp.com/uploads/1/3/0/6/130640239/tabewel.pdf
    • http://pjperformance.org/uploads/1/3/0/7/130775705/3101008.pdf
    • http://m3smedia.com/uploads/1/3/0/5/130589308/lofagovirogi.pdf
    • http://votelorijackman.com/uploads/1/3/1/3/131384015/6055506.pdf
    • http://elitecanineconcierge.com/uploads/1/3/0/7/130739646/374098.pdf
    • http://gosiacalderon.com/uploads/1/3/1/4/131453214/nusami-wezojegodabuw.pdf
    • http://mike-scott-music.com/uploads/1/3/0/7/130740051/db9cd1da.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a79.bin
bf326caa09aac1ed1069bfee1fb174c2ad7864e5cf5d455a31f0353e173ba3c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A79 7060 bytes

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