Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5738a90e005cf96…

MALICIOUS

PDF

57.0 KB Authoring application: SWFTools
MD5: 229f1029f4e1a129012f0428ca045676 SHA-1: 84478994d514da7db544fb53f1e39c4646565048 SHA-256: a5738a90e005cf961eb21d7d254f0e838db916da9dae017d98da57e8a4ac73fc
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including a critical alert for a link farm and ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0'. The document body contains numerous embedded URLs, indicating a phishing or redirection attempt. The primary attack pattern involves leveraging these links to direct users to potentially malicious content.

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://wura.uahim-dev.ru/uploads/2020/01/28/piwitokev.pdf
    • http://vakiveba.meilleure-comparatif.com/uploads/2020/01/28/1692720.pdf
    • http://the-crest-at-prince-charles.com/uploads/1/3/0/4/130475883/tefadopasoket-fejaxufet.pdf
    • http://psbclan.com/uploads/1/3/0/6/130621521/nanera.pdf
    • http://geletuba.in-op.fun/uploads/2020/01/28/8528717.pdf
    • http://crystalrenes.com/uploads/1/3/0/3/130313343/2553613.pdf
    • http://cfthomas.com/uploads/1/3/0/5/130539188/130539188.html#app+%C4%91o+t%E1%BB%89+l%E1%BB%87+khu%C3%B4n+m%E1%BA%B7t

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001393.bin
fcead6a3b548f3bfe8a1b66f3ce670f40e737769354155e07cca90230dd0ca0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1393 11816 bytes
font_01_sfnt_off00008fd4.bin
16906172e5d24a41215db8653cb8e69b06b2acdfd41a2c7e096f2fce2287599b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FD4 25016 bytes

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