Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2344c1aa1f02ffd…

MALICIOUS

PDF

344.3 KB Created: 2015-08-28 11:48:11 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: b6fd6f57b31763f4f5cf4c693891cbdb SHA-1: d21439c6dbfa25a4e22f6f4985dda01437da365f SHA-256: f2344c1aa1f02ffd736d9e20be75e4bd72c79fddbc8b8b447c2e429ff5505b88
90 Risk Score

Malware Insights

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

The PDF file was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL points to 'botcraftman.ru', which is identified as a malicious redirector. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine the exact lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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%A1%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%BB%D0%B0%D1%83%D0%BD%D1%87%D0%B5%D1%80+%D0%B4%D0%BB%D1%8F+%D0%BC%D0%B0%D0%B9%D0%BD+%D0%BA%D1%80%D0%B0%D1%84%D1%82&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802531_masha__i__medved_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802572_kalendar__dlya__android_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802655_spravka__2ndfl__za_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00051ed2.bin
19fab5c07fe538f29934b6da14ebc1d7ca5431d6b6e0da05ed1ce6ce8ced4499		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51ED2 7928 bytes
font_01_sfnt_off00053595.bin
3d440dcf3d96a1baab7f3c5faf7650e0db4bc6e65812069a7a493ff620ed6ed1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53595 13804 bytes

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