Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc05507a17b39975…

MALICIOUS

PDF

367.7 KB Created: 2015-08-19 14:06:05 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 0a820ab381907d20103c401d18ccdbaa SHA-1: 45c6d58721500b02bda69e6a43ba78b43acecb83 SHA-256: bc05507a17b3997525d3b9f79d6363483026cdd6f433a99b3e7ea97abe9d7f8e
90 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical alert for a link to a known malicious redirector. The ML classifier also assigned a high probability of maliciousness. The embedded URL `http://botcraftman.ru/...` is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware distribution site. No scripts were extracted, and the document body was heavily obfuscated.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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%9F%D1%80%D0%B8%D0%BA%D0%B0%D0%B7+%D0%BE+%D0%BD%D0%B0%D0%B7%D0%BD%D0%B0%D1%87%D0%B5%D0%BD%D0%B8%D0%B8+%D0%BA%D0%BE%D0%BC%D0%B8%D1%81%D1%81%D0%B8%D0%B8+%D0%B4%D0%BB%D1%8F+%D1%81%D0%BF%D0%B8%D1%81%D0%B0%D0%BD%D0%B8%D1%8F+%D1%82%D0%BC%D1%86&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4626/4626453_ocenki_gia_po_matematike_2015_9_klass_po_pasportu_onlayn.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4626/4626500_skachat_mech_2_sezon_cherez_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4626/4626620_gotovuyy_dnevnik_po_proizvodstvennoy_praktike_medsestruy.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00057849.bin
d2ecfd28fd3b2b8443110421f80ea4246db37004ec889c2f6323ba712fc6c4cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57849 9488 bytes
font_01_sfnt_off00059226.bin
f31d062e1c9aef931d686f2b6d243e166e446ce7e68b66a94a929848dc15c4a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59226 13880 bytes

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