Malicious PDF — malware analysis report

Static analysis result for SHA-256 44735eb9af449589…

MALICIOUS

PDF

33.2 KB Authoring application: Karbon
MD5: eeed3d99fb4a117757a7bcc31f0ad6b9 SHA-1: b0dd93637dbca050be72549ec2c55f6f6be500f5 SHA-256: 44735eb9af449589cbc951cb99ca5ee58b0d08bcb062d9e78bfedd025e627c62
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious phishing content. The PDF_SEO_LINK_FARM heuristic indicates a large number of embedded URLs, with the primary one being http://synergyassistllc.com/uploads/1/3/0/4/130483096/c88f6b58e2e529.pdf. This suggests the document's purpose is to redirect users to potentially harmful sites, likely as part of a phishing or SEO poisoning campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://synergyassistllc.com/uploads/1/3/0/4/130483096/c88f6b58e2e529.pdf
    • http://latoniaprice.com/uploads/1/3/0/5/130550660/7898af318.pdf
    • http://pottywhisperer.net/uploads/1/3/0/5/130542758/dexowiserivukog.pdf
    • http://peputpenkkiin.fi/uploads/1/3/0/4/130483766/xewis.pdf
    • http://ktsky1.com/uploads/1/3/0/6/130604215/9433923.pdf
    • http://migrationcelebration.com/uploads/1/3/0/4/130476970/a60216ca09f.pdf
    • http://littlehimsandhers.com/uploads/1/3/0/5/130551927/tosula-jiderozameva.pdf
    • http://cyclebavaria.com/uploads/1/3/0/5/130543743/130543743.html#street+dance+1+full+movie+online+subtitrat+in+romana

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001392.bin
509725625414ba35a9e95b70d98511f9ea4ef0a4adc7b23d937d20c74c87da14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1392 9312 bytes

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