Malicious PDF — malware analysis report

Static analysis result for SHA-256 90ef692122c6d8fa…

MALICIOUS

PDF

38.9 KB Authoring application: Solid Converter PDF
MD5: fb741d7211b59bca618f24503fe033f3 SHA-1: 964c007401b72fa318633c5846263ae6d74a197e SHA-256: 90ef692122c6d8fa435b2b2c52d6c41c55c7d18ceb7dbf8696c43dd5e6c947c4
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, with the primary domain being kellenkellenkellen.com. This heuristic, combined with the ML classifier and ClamAV detection, strongly suggests a malicious intent, likely related to phishing or malware distribution. The embedded URLs indicate a link farm strategy to redirect users to potentially harmful content.

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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://kellenkellenkellen.com/uploads/1/3/0/2/130291371/jofumuw-gokizufof.pdf
    • https://nixovofenajot.weebly.com/uploads/1/3/0/4/130435619/314f0cb8a2961d.pdf
    • https://xivekifiwixobol.weebly.com/uploads/1/3/0/2/130271250/mepupaxivafa.pdf
    • http://kitchensdoorsanddrawers.com/uploads/1/3/0/6/130605076/8232193.pdf
    • http://prevention4balance.com/uploads/1/3/0/5/130550982/d4812785bfc1f7.pdf
    • http://the-indie-author-method.com/uploads/1/3/0/5/130538997/mibaf_kezuvexatukazu.pdf
    • http://samodifolu.tral62.ru/uploads/2020/01/28/9369437.pdf
    • http://nashobavalleyextractco.com/uploads/1/3/0/5/130551402/130551402.html#b.+a.+e.+d+full+form

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001339.bin
997d0748494df357c86994d3051403e7810c289dc49e2c6a2da0e8fcbb6d80ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1339 8836 bytes

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