Malicious PDF — malware analysis report

Static analysis result for SHA-256 de6332d72f8c6bc9…

MALICIOUS

PDF

34.8 KB Created: 2020-04-03 17:06:17 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ab98e84993f3b780595dfcdb420e9866 SHA-1: 0cea591c9bc3002a437301d71ebe41dd75f5ee7b SHA-256: de6332d72f8c6bc92352d3ac600c64d0ad199e8b7faef4854548825b5169bbd8
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to similarly structured URLs on different domains. This suggests a link farm or SEO manipulation tactic, potentially to distribute malicious content or pages. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the suspicious linking behavior. No scripts were extracted from this sample.

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://heidihackford.net/uploads/1/3/1/0/131070398/131070398.html#radha+madhu+serial+cast
    • http://cpdforoncology.net/uploads/1/3/0/4/130436306/6760979.pdf
    • http://johnthomsbehaviormethod.com/uploads/1/3/1/3/131380604/nodinu-jepepiwo.pdf
    • http://bdanalytics.net/uploads/1/3/0/6/130639538/5980416.pdf
    • http://ahti.biz/uploads/1/3/0/7/130776308/ladogoburijan.pdf
    • http://jnewoodworking.com/uploads/1/3/0/7/130775880/wipurusafulab.pdf
    • http://yumilkarivera.com/uploads/1/3/0/3/130313148/b24f5a81.pdf
    • http://healthcannabis.com/uploads/1/3/0/4/130476458/1418688.pdf
    • http://msksjewelryboutique.com/uploads/1/3/0/5/130551856/2ada7e2d609a9.pdf
    • http://accoladetechnoheights.com/uploads/1/3/0/5/130541023/7658251.pdf
    • http://thesimpleoven.ca/uploads/1/3/0/7/130739928/mebiwole.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_off0000579d.bin
f01a63f67ba9ee1f84f28687ef7c13625b87ccefe2b1ff85ba2277946b0505cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x579D 11396 bytes

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