Malicious PDF — malware analysis report

Static analysis result for SHA-256 b540428c6a87d446…

MALICIOUS

PDF

361.2 KB Created: 2015-08-21 09:19:44 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: c1b350c730db23aa00644fc8dbde9dd6 SHA-1: aab326639ee0149c84cc9530350b4b1146975172 SHA-256: b540428c6a87d4465be3b90f21436b7c276e808245043abb9e67b3e6189a153e
90 Risk Score

Malware Insights

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

The PDF contains an embedded link to a known malicious redirector infrastructure. The ML classifier also flagged this PDF with high confidence. The primary attack vector appears to be directing the user to the malicious URL, which is likely used to deliver a secondary payload or conduct a phishing attack. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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%BF%D1%80%D0%BE%D0%B3%D1%80%D0%B0%D0%BC%D0%BC%D0%B0+%D0%B4%D0%BB%D1%8F+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D1%8B%D1%85+%D0%BF%D0%BE%D0%BA%D1%83%D0%BF%D0%BE%D0%BA+%D0%B2+%D0%B8%D0%B3%D1%80%D0%B0%D1%85+%D0%BD%D0%B0+%D0%B0%D0%BD%D0%B4%D1%80%D0%BE%D0%B8%D0%B4&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654694_shkolnica_3_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654691_drayvera_dlya_pleera_qumo_boxon.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654729_skachat_woodcutter_simulator_2015_na_russkom_cherez_torrent.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00055a51.bin
3a65636d06159b11165c39bba13366787b2e997031ee38f696543ffe649ec657		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55A51 8684 bytes
font_01_sfnt_off000572ca.bin
3d282bce6c65c8570042c57b187903f098b486a7a75007e71cec5bb91aa4c078		 pdf-font-stream PDF embedded font (sfnt) at offset 0x572CA 16596 bytes

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