Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4ec635bb933bb47…

MALICIOUS

PDF

353.5 KB Created: 2015-08-22 08:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 187a98734f5853d8ee8f954e7bb66162 SHA-1: fc56efaf05bd359d88bea9bf4cc3ecf921ff955d SHA-256: b4ec635bb933bb4790c7529b78d881908ce331b8810e2769199dd9c59c8e2b54
90 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, botcraftman.ru. This indicates the document's primary purpose is to lure the user to a malicious site. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of 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=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%BF%D0%BE%D1%80%D0%BD%D0%BE+%D0%B8%D0%B3%D1%80%D1%8B+%D0%BD%D0%B0+%D0%BF%D0%BA&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4674/4674478_dzhon_grin_bumazhnuye_goroda_skachat.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4674/4674552_kompyuternuyy_kroy_lambrekenov_skachat_besplatno_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4674/4674533_rusifikator_dlya_hellgate_global.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000540f9.bin
d819d765be58d76ce56ba4e20acee987fd159c8f97e9cc6a1eebbe7615d4847b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x540F9 7116 bytes
font_01_sfnt_off0005556a.bin
c70e435afef857b5cbbc793ad1ed135a23a2132bc8107c154850d6b1086a3539		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5556A 16224 bytes

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