Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ba1cecd20f2cc0a…

MALICIOUS

PDF

363.5 KB Created: 2015-08-24 01:53:09 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 70f980c6301a0cf24dc80cb6b110a94b SHA-1: 5f398aa0ae504ef103a3d4afff5ca233540578e3 SHA-256: 7ba1cecd20f2cc0acaf019d82214da8a1a3dd5d0562a076332e13f4b29f67161
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, botcraftman.ru, which is likely used to deliver a payload. The document body, though heavily obfuscated, contains keywords related to downloading drivers for Xerox printers on Windows 7, suggesting a lure. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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%B4%D1%80%D0%B0%D0%B9%D0%B2%D0%B5%D1%80+%D0%BF%D1%80%D0%B8%D0%BD%D1%82%D0%B5%D1%80%D0%B0+xerox+phaser+3160b+%D0%BD%D0%B0+windows+7&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4694/4694743_akt__priemki__dopolnitelnuyh_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4695/4695138_proteus__8__skachat_.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4694/4694891_kompleksnuye__zadaniya__k_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00056217.bin
08b35cab73a6e59788101537b9cf44143d91e3aae315c141f6f8101a60aa042c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56217 10276 bytes
font_01_sfnt_off00057e72.bin
ceeebdb531cab8a3740e296f4274eb03dd88fca8f91a0399de318626101c202a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57E72 15260 bytes

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