Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aa454f91fa5ceb2…

MALICIOUS

PDF

354.3 KB Created: 2015-08-28 11:38:24 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: ed60f8f90738c720b6172a6573de4b4a SHA-1: 35dad086a4db720881628f52ad30505fa57ec4d0 SHA-256: 2aa454f91fa5ceb2dde5cee06d4f98834206943039a32d5eb6354e44f8ff41da
92 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, http://botcraftman.ru/, which is likely intended to deliver malware or lead to a phishing site. The document body, though heavily obfuscated, contains references to 'corel draw' and 'wkhtmltopdf', suggesting a lure for software downloads. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

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+%D1%88%D1%80%D0%B8%D1%84%D1%82%D1%8B+%D0%B4%D0%BB%D1%8F+corel+draw&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802518_skachat__video__valyusha_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802360_panasonic_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802479_skachat__microsoft__excel_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00053f53.bin
bdbafd6eac291fe6102f44c23561f966a834409dd703e3a463fcd30872f76212		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53F53 10312 bytes
font_01_sfnt_off00055b8e.bin
9549b9c19199f6fbce78b1b0e7d5d77064a3fb97fb7a7c33b5ac94472c92aac6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55B8E 15160 bytes

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