Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c94047e12ba4c42…

MALICIOUS

PDF

43.8 KB Created: 2020-04-07 03:04:16 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b7a233da499157ca59acd9fb8b455eee SHA-1: 6a7e8aae5f8020941678bd0344153bbd973fed87 SHA-256: 0c94047e12ba4c42329ec2f176897519b8ad29dd673b8024339920ea6c304e1c
96 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which are numerically or generically named, suggesting a link farm designed to host malicious content. The document body, though partially corrupted, contains a URL that appears to be a lure for a vehicle owner's manual, likely to entice clicks. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple external links supports a high-risk assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://ttmusb.com/uploads/1/3/1/4/131482826/131482826.html#2015+ford+transit+custom+owner%27s+manual
    • http://jrsheatingandcooling.net/uploads/1/3/0/6/130640028/916643.pdf
    • http://hwexperience.nl/uploads/1/3/1/0/131070313/gemefebokux-wubexixak.pdf
    • http://sfbrewfestnveganeats.com/uploads/1/3/0/6/130639477/23886d634fd7.pdf
    • http://middlerhoadclothing.com/uploads/1/3/0/5/130541209/5956564.pdf
    • http://meandmyicing.com/uploads/1/3/0/5/130588595/gobogo.pdf
    • http://expertwitnessservices.net/uploads/1/3/0/2/130272435/vobubanezaliv.pdf
    • http://kerrygerdesphoto.com/uploads/1/3/0/9/130969831/7d41e14.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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006be2.bin
289b1d1b3a44883ed42e822f26a828ed3da887622f3455db168f463a09069339		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE2 8932 bytes
font_01_sfnt_off00008d62.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D62 16036 bytes

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