Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb31af9850afceb7…

MALICIOUS

PDF

349.8 KB Created: 2015-08-26 10:25:46 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: d706befc319693e20d6f7ff9b3cdd9d4 SHA-1: a2270b949728dcbbd21198f2416f52a22d28a2af SHA-256: fb31af9850afceb7454c54322a35cf8039cc0bdcf2305dad908d9a830015087e
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, botcraftman.ru. This indicates the document is designed to lure users to a harmful site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious URL is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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=xrnetserverdll+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B4%D0%BB%D1%8F+%D0%B8%D0%B3%D1%80%D1%8B+stalker+%D0%B7%D0%BE%D0%B2+%D0%BF%D1%80%D0%B8%D0%BF%D1%8F%D1%82%D0%B8&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4752/4752087_koduy__na__nokia_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751512_polieleynaya__sluzhba_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751721_sovremennuye__notuy__dlya_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000531a8.bin
689de944df065166fcb2d291ac59a43c7c3cc6a1c7af5b2325da554f6beee2aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x531A8 8920 bytes
font_01_sfnt_off00054ac1.bin
4064cba4240c7d7f50714ac5705fad676707d44376bdab01f1db1cb394ab8ead		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54AC1 14196 bytes

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