Malicious PDF — malware analysis report

Static analysis result for SHA-256 1db1ea806045fc71…

MALICIOUS

PDF

352.8 KB Created: 2015-08-28 11:34:14 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: e1cb4c2d32cf8905218200319f7e2269 SHA-1: 0cbbe94f5f26081b8d64bad9c8e8374278c01ba5 SHA-256: 1db1ea806045fc71e918e188d16afdfbd7939512fc45c73f40d4135476874ecc
92 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lure the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious URL is sufficient evidence for the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 2

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://botcraftman.ru/?lip&keyword=%D0%B4%D0%BE%D0%B3%D0%BE%D0%B2%D0%BE%D1%80+%D0%BA%D1%83%D0%BF%D0%BB%D0%B8-%D0%BF%D1%80%D0%BE%D0%B4%D0%B0%D0%B6%D0%B8+%D1%82%D0%BE%D0%B2%D0%B0%D1%80%D0%B0+%D1%81+%D0%BF%D1%80%D0%B5%D0%B4%D0%BE%D0%BF%D0%BB%D0%B0%D1%82%D0%BE%D0%B9+%D0%BE%D0%B1%D1%80%D0%B0%D0%B7%D0%B5%D1%86&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802416_maynkraft__1__5_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802415_formula__bayesa_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802401_gta__mta_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00053969.bin
a9799d1bba58a339151db253b3c32d96f7fa0312f84c8ec8236d21eb0744104c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53969 10688 bytes
font_01_sfnt_off000557ec.bin
ef7ff0e4d478c42f2f2e2dfb5f812bfcde2117df7f70a522d3c63f0326fec896		 pdf-font-stream PDF embedded font (sfnt) at offset 0x557EC 13868 bytes

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