Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba93d9d71813e483…

MALICIOUS

PDF

45.7 KB Created: 2020-03-22 10:06:47 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: abb9ad3d0938d62e407e9535663c6e53 SHA-1: c29e5950e22689533696487b92dedac3b571e4c0 SHA-256: ba93d9d71813e483984627291b0959bba9aa4eb73094e96df0f7ffa8c2993cbd
92 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, containing numerous external links to other PDF files hosted on various domains. The ML classifier strongly indicated maliciousness. The primary attack pattern involves directing users to a network of SEO-optimized websites, likely for further malicious activity or to generate ad revenue. No scripts were extracted, and the document body contained only garbled text and embedded URLs.

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://theinterdependentorganization.com/uploads/1/3/1/1/131164174/131164174.html#motor+cd+principio+de+funcionamiento
    • http://riverbendbernedoddle.com/uploads/1/3/0/6/130621137/vazomexelesowe.pdf
    • http://garagedoorrepair-newport-beach-ca.com/uploads/1/3/0/9/130969796/dikiwifefepo.pdf
    • http://pawleysislandwelcomecenter.com/uploads/1/3/0/8/130874161/favetoli.pdf
    • http://dogodogo.ru/uploads/1/3/0/6/130621844/1892402.pdf
    • http://mycarenow.us/uploads/1/3/1/0/131071220/8558922.pdf
    • http://notostraws.com/uploads/1/3/0/8/130813558/7f5a7183a40a453.pdf
    • http://havocairsoft.co.uk/uploads/1/3/0/3/130323952/12579d46.pdf
    • http://captreefishingboat.com/uploads/1/3/0/6/130639083/477ad5e8d624cb.pdf
    • http://vinyl61.net/uploads/1/3/0/7/130738706/4580de61b7066.pdf
    • http://josephineegalgi.com/uploads/1/3/0/5/130544034/310b5e69903.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_off00007fd4.bin
4b3ba5547836c317c9319c40ed8b408ceb874332f3cd0af718c2d39db645c409		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FD4 2448 bytes
font_01_sfnt_off00008a0e.bin
5e9cc8ff47a36fbfd71ff746cd14097a9e2ea5136ac089dd7fc159b80eed35f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A0E 8148 bytes

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