Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b9ea2a8c516668…

MALICIOUS

PDF

45.5 KB Authoring application: pstoedit
MD5: d50347f6d01c172b3cb9368adbef85b4 SHA-1: 5afdaf38b67808135a8d03002cfc7654f5c5a94d SHA-256: 06b9ea2a8c51666802c9eb816b8272fc62709112fdbae6366771b640dc61405b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to multiple external PDF files, a common technique for distributing phishing content or malware. The ClamAV detection and ML classifier strongly indicate maliciousness. The embedded URLs are the primary indicators of compromise, suggesting a phishing or download lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://smuphideltatheta.com/uploads/1/3/0/2/130272856/c05b8.pdf
    • http://1860tea.net/uploads/1/3/0/5/130545684/nimixujabot.pdf
    • http://syneride.com/uploads/1/3/0/3/130323515/2d3ea4.pdf
    • http://phillipskruse.com/uploads/1/3/0/3/130312996/130312996.html#call+of+duty+4+modern+warfare+key+co
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001075.bin
11ee0fac456a5168d5b4d6a5ad2dc73bf0d58c37556ab793215ec4459dc614e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1075 11704 bytes
font_01_sfnt_off00006337.bin
552ca9e222189997ec73e551b674c2d9f268751f6df62f5b32584fc3706a83ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6337 23488 bytes

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