Malicious PDF — malware analysis report

Static analysis result for SHA-256 92474df443017b44…

MALICIOUS

PDF

36.0 KB Created: 2020-04-12 08:38:31 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9afb4cfab48eb16449c35f31eb6ef447 SHA-1: d5442cb12a8e1422e2fbeabec6bfca4edc126330 SHA-256: 92474df443017b4421fd27291f07d320c239b043079966ca878b42b907adb5ff
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO manipulation or to distribute further malicious content. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the PDF structure itself is suspicious due to the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://urbanvertical.ca/uploads/1/3/1/3/131379054/131379054.html#mapa+conceptual+metodos+de+la+filosofia
    • http://advanceddrugtesting.net/uploads/1/3/1/3/131384567/zojatitujaxovu.pdf
    • http://limriky.com/uploads/1/3/1/3/131384362/05ef6a2aedb01e.pdf
    • http://awjdesigns.com/uploads/1/3/0/4/130475879/bafuga.pdf
    • http://atlanticpaint.com/uploads/1/3/1/4/131409009/januwu.pdf
    • http://photobarn.net/uploads/1/3/0/4/130475936/roturavenuxa_gigopake_xokik.pdf
    • http://pattycakecoach.com/uploads/1/3/0/6/130639091/4212341.pdf
    • http://southernanchorageaccommodation.com/uploads/1/3/1/4/131438640/kafufifalunegu-ginikaladu-sivusoluj-pevoku.pdf
    • http://ergzna.net/uploads/1/3/0/3/130323216/gumimixavabusak_xukubuzaf_denifowakobagi_vovodakujaleja.pdf
    • http://truth-watch.info/uploads/1/3/0/5/130539843/0b1668e.pdf
    • http://kat2cd.org/uploads/1/3/0/2/130291453/5536362.pdf
    • http://southernanchorageaccommodation.com/uploads/1/3/1/4/131438640/kafufifalunegu-ginikalad
    • 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_off00006495.bin
2dd71f64169ece681c338dee85857deeaa5f654f24ae74e4d51f7eb16ec1b6dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6495 8124 bytes

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