Malicious PDF — malware analysis report

Static analysis result for SHA-256 285fa7fbb2cb8bcd…

MALICIOUS

PDF

365.0 KB Created: 2015-11-07 03:16:28 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 64fcc78c2cd8b6d30fc1de16adeac081 SHA-1: 59d9b05dc23f722aa13f2a9f77ac99f02d87b438 SHA-256: 285fa7fbb2cb8bcda7db48c50c8e54907a0575dc2c728bef86eb21e27b5dd8fe
70 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by the PDF_JS heuristic. This script is designed to redirect the user to the external URL http://taurus-tg.ru/, which is flagged as suspicious. The ClamAV detection of 'Pdf.Dropper.Agent-7674818-0' further confirms its malicious nature. The embedded JavaScript likely facilitates the download or redirection to a secondary malicious payload.

Heuristics 4

  • ClamAV: Pdf.Dropper.Agent-7674818-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7674818-0
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://taurus-tg.ru/?nnr&keyword=%D0%9C%D0%B5%D1%87%D1%82%D0%B0%D1%82%D0%B5%D0%BB%D1%8C%D0%BD%D0%B8%D1%86%D0%B0+%D0%BC%D0%BE%D0%BD%D0%BE%D0%BB%D0%BE%D0%B3+%D0%B4%D0%B6%D0%BE%D1%80%D0%B4%D0%B6%D0%B8+%D1%8D%D0%BB%D0%BC%D0%B5%D1%80+%D1%80%D0%B0%D0%B9%D1%81+%D1%87%D0%B8%D1%82%D0%B0%D1%82%D1%8C&charset=utf-8
    • http://media.nn.ru/data/ufiles/2015-11/1e/53/b6/563c9bafee1ac_skachatpleimarketnaandroid411.pdf
    • http://media.nn.ru/data/ufiles/2015-11/dd/a0/c2/563d04447aaae_rabochaiaprogrammavospitateliapofgossredniaiagruppa.pdf
    • http://media.nn.ru/data/ufiles/2015-11/3c/1b/a2/563cbfceea562_pourochnyerazrabotkipomkhk10klassdanilovaskachatbesplatno.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005726b.bin
eebad8b6b6d7a171eebfad957e642de763cc4c491a4f5cd197db6909b8e58ee4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5726B 8104 bytes
font_01_sfnt_off000589dc.bin
37cdea7478f05e8e729f1e76e84c9e5e76e79fb03fa3666c8faf891f494b5ae9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x589DC 13556 bytes

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