Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc15820b143d2d71…

MALICIOUS

PDF

40.7 KB Authoring application: PDFBox
MD5: 9a8897122e9a9735637e789dd4da1b93 SHA-1: 7d4b9a8552cad9936f5a2bd741770dc64303cb3d SHA-256: dc15820b143d2d71eef857d76602e7e0d7f8345e14f2a7fa62a7b55acb9245fc
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The primary heuristic identified a large number of embedded external links, suggesting a link farm or distribution mechanism. The document body, though heavily obfuscated, does not provide further context on the specific lure. The presence of numerous unknown-reputation URLs points to a coordinated effort to redirect users.

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.
  • 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://www.jabir-organix.com/uploads/1/3/0/7/130739539/sanago.pdf
    • http://malibubartending.co/uploads/1/3/0/6/130604285/7b7fe2188119.pdf
    • http://natbayley.com/uploads/1/3/0/6/130604326/xefazuname.pdf
    • http://ssphotography.net/uploads/1/3/0/4/130435891/lesuxeki.pdf
    • http://tuknikgs.com/uploads/1/3/0/6/130639691/jamiviguvi.pdf
    • http://fielddaycreativeco.com/uploads/1/3/0/6/130620826/wapotosudoxuluk.pdf
    • http://thembmethod.com/uploads/1/3/0/7/130776409/8023198.pdf
    • http://cloudfai.com/uploads/1/3/0/6/130639461/0cae97668a82c.pdf
    • http://finethreadsfilm.adelepham.com/uploads/1/3/0/3/130313190/juvuke.pdf
    • http://sbcperu.org/uploads/1/3/0/6/130620667/3779291.pdf
    • http://otstottdesign.com/uploads/1/3/0/6/130640063/2370129.pdf
    • http://chironetics.org/uploads/1/3/0/4/130483407/3099487.pdf
    • http://shannoncallarman.com/uploads/1/3/0/2/130287942/rexagu.pdf
    • http://w83.brdge.org/uploads/1/3/0/8/130813991/130813991.html#time+delay+circuit+diagram+using+555+timer
    • http://sbcperu.org/uploads/1/3/0/6/130620667/3779

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046c4.bin
fb9ce350675b05e754091d2478745ca5c2ba9cb8ba887f73e0b3dd05e8ff046d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46C4 7972 bytes

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