Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6693090b281ebd5…

MALICIOUS

PDF

32.9 KB Created: 2020-06-22 02:12:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 021e553430d3689d9829f0dddc3ce149 SHA-1: 999fdcdb94dedf14838315efdfdd6618d2eab39a SHA-256: b6693090b281ebd5ba3bdcd68bb80b6790caa167eea986e44c7ab60cebdeffde
92 Risk Score

Malware Insights

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

The PDF document was identified as malicious by an ML classifier. It contains a large number of external links, a technique often used for SEO manipulation or to distribute further malicious content. The document body suggests a lure related to a car manual, but the primary malicious activity appears to be the extensive link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://childsplayotservices.com/uploads/1/3/0/4/130435914/130435914.html#2002+acura+mdx+owners+manual+pdf
    • http://artistinlivingcolor.com/uploads/1/3/0/4/130491757/nefagimuvapasis.pdf
    • http://myedpiphany.com/uploads/1/3/0/7/130776659/guvomimiboxilenasa.pdf
    • http://narcanna.org/uploads/1/3/0/8/130874326/a447f7ef97.pdf
    • http://academievoorhetleven.nl/uploads/1/3/0/7/130775379/9875615.pdf
    • http://katskornerinternational.org/uploads/1/3/1/4/131438202/razonegupel_boriz.pdf
    • http://throwthehammer.com/uploads/1/3/1/8/131871768/dabd56a86104.pdf
    • http://richarddaviescelebrant.com/uploads/1/3/1/8/131871462/b6dcd1381a5.pdf
    • http://mx.oregoneqc.com/uploads/1/3/0/5/130588607/bedubunukup.pdf
    • http://4wu.undesirable.us/uploads/1/3/0/8/130814715/felamoworanedum.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000444a.bin
932fe38d041ce1d410b2a0d56665a9afc15225cb3f4c55fc2ef1b38a8b8d05ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x444A 5392 bytes
font_01_sfnt_off0000568c.bin
4cb331b7b88fe36ae2e9334802a8e5f4092c9bdf6bbf8d4e2190f9d42fb707a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x568C 9552 bytes

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