Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9460354d09ad03e…

MALICIOUS

PDF

38.2 KB Created: 2020-04-18 23:45:17 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a08d191a59466cd15c6afb1551acb666 SHA-1: 064027fc881b023352c846536e21f0486db6523c SHA-256: c9460354d09ad03e9560ada72614d8cd109da25089c345301c19d595ec4d661a
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also strongly indicated maliciousness. The document body contains text related to 'Teva platform sandals cheap', suggesting a lure for potential shoppers, which is then followed by a large number of links to unrelated domains, indicating a link farm for SEO manipulation or to host further malicious content.

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://rjcpayments.com/uploads/1/3/1/1/131164156/131164156.html#teva+platform+sandals+cheap
    • http://topshomeinspection.com/uploads/1/3/1/4/131408298/d2e9748.pdf
    • http://gmountbatteninc.org/uploads/1/3/1/4/131406656/46b33f2e49.pdf
    • http://fairvotepiercecounty.com/uploads/1/3/1/0/131071166/39a674bc1d46.pdf
    • http://ugandaproject.com/uploads/1/3/0/7/130738657/270697.pdf
    • http://thecorrecttech.com/uploads/1/3/1/4/131437561/802e8e3b38a.pdf
    • http://kaitsaforauditor.com/uploads/1/3/0/2/130291433/mibasav-zevorusi-polukodolenag-vuvoxedajilab.pdf
    • http://lucyscakes.org/uploads/1/3/1/4/131408170/e614daaa693c4.pdf
    • http://msealsphotography.com/uploads/1/3/0/2/130270904/7515687.pdf
    • http://steel-linegroup.com/uploads/1/3/0/6/130620640/5908730.pdf
    • http://lisathomascounselingcorner.com/uploads/1/3/0/2/130289651/sekulabudalew.pdf
    • http://foreverviewfarms.com/uploads/1/3/0/4/130476970/zanizadudamul.pdf
    • http://activeresponsellc.com/uploads/1/3/0/9/130969065/jibunuraj.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_off00005913.bin
a1eee90e35dfeaa5bbb7eb1f44da6a48ad491b54a6275a645f6bec4dbfa59b8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5913 7956 bytes
font_01_sfnt_off00007818.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7818 16036 bytes

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