Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb361c6b4f1ea193…

MALICIOUS

PDF

45.7 KB Authoring application: Solid Converter PDF
MD5: c109a439221f3d695a4fa764946a3821 SHA-1: e2399dd0476d7b2497e6a256283aacd34147bc71 SHA-256: bb361c6b4f1ea193aa269c85ce0ab9868c0efa6d53e92e43c1606f458909b96f
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO manipulation or to distribute malware. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly indicate malicious intent. The heuristic 'PDF_SEO_LINK_FARM' confirms the presence of a link farm, suggesting the primary goal is to drive traffic to these external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9725

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://umotivemove.com/uploads/1/3/0/5/130589057/jekasabanojifuv.pdf
    • http://wexoxama.storeshop.xyz/uploads/2020/01/28/6346881.pdf
    • http://mysendittosanta.com/uploads/1/3/0/3/130324192/da703ff447.pdf
    • http://mysebgroup.com/uploads/1/3/0/6/130621394/bbc1da5.pdf
    • http://bodysoulcomplementarytherapies.com/uploads/1/3/0/6/130604141/1502097.pdf
    • http://somethinghoppy.com/uploads/1/3/0/5/130551192/beguwokaka.pdf
    • http://juliejesternewman.com/uploads/1/3/0/6/130604314/130604314.html#ethanol+and+oxygen+reaction+acetic+acid+balanced+equation

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004420.bin
724115f7536f99284ca3fa3c2ec70c0b4fd21d2ee7856b416e8eba8eb49e127d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4420 8924 bytes

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