Malicious PDF — malware analysis report

Static analysis result for SHA-256 241301b0d05c72f8…

MALICIOUS

PDF

364.6 KB Created: 2015-08-25 09:20:08 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: b1c6c973af6190f9e57d407ba21d66b6 SHA-1: 6497327fba40b1c668c97ed3deda7a6af66b0a8d SHA-256: 241301b0d05c72f80fcea2e63f49f2b627441b4c343032ae9792812b43935cfc
90 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL, http://botcraftman.ru/..., is the primary indicator of compromise. The document body was heavily obfuscated and truncated, preventing a more detailed analysis of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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=%D1%81%D1%86%D0%B5%D0%BD%D0%B0%D1%80%D0%B8%D0%B9+%D0%B7%D0%B0%D0%BA%D1%80%D1%8B%D1%82%D0%B8%D1%8F+%D0%BB%D0%B5%D1%82%D0%BD%D0%B5%D0%B3%D0%BE+%D0%BB%D0%B0%D0%B3%D0%B5%D1%80%D1%8F&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4726/4726035_kompas__3d__v14_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4725/4725178_dogovor__zayma__mezhdu_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4725/4725615_skachat__nodvd__dlya_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00056b36.bin
4d66ab4c084f4ecf0d4abd5170a49b883ffef14cb2005025df9d2c4d84352e42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56B36 8376 bytes
font_01_sfnt_off00058281.bin
286698e86817ce4b2e91c852f2ba9f08d13debca8ea0b58845815148ec3dca02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58281 15980 bytes

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