Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b4895ac35a5d134…

MALICIOUS

PDF

381.4 KB Created: 2015-08-24 01:46:35 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: d5f4efeb2809bd0e8deb70262fecf6a9 SHA-1: c9790b0cf52345ff6105becee108bed9d1d158e0 SHA-256: 1b4895ac35a5d13453909905cd3691bd638ef63b3035d7444af445ed79a0805d
92 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to deliver a payload. The ML classifier also flagged this PDF with high confidence. The document body is heavily obfuscated and appears to be a garbled attempt to display text related to Windows XP, likely as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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+windows+xp+home+edition+sp3+oem+rus+%D1%87%D0%B5%D1%80%D0%B5%D0%B7+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4694/4694340_pro100__520__skachat_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4693/4693221_skachat__indikator__pivot_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4693/4693871_bring__me__the_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005a75d.bin
4b45489b502fa2d23c0dd47de54cbe8e9a09163004eb959968225eadafe677a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A75D 10500 bytes
font_01_sfnt_off0005c42a.bin
ff10919941fa1fd360a3e8701aa36aa3473aae19ddd3fc5d967e740706eca21c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C42A 16616 bytes

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