Malicious PDF — malware analysis report

Static analysis result for SHA-256 b139b0863a42cf70…

MALICIOUS

PDF

377.4 KB Created: 2015-08-25 08:54:56 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 1a6c9d7c4e9120ce79493a3077486dd2 SHA-1: ac98ae6340fb26fce51dfb06256b18bcc3cc5ca9 SHA-256: b139b0863a42cf702ec493b377e6780c4291dc3c71da9b75e21a9601c850bcc3
90 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, specifically due to an embedded link pointing to known malicious redirector infrastructure at botcraftman.ru. This suggests the document is designed to lure users to a harmful website. No scripts were extracted, and the document body was heavily obfuscated, preventing further analysis of its specific content or intent beyond the malicious link.

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=%D0%BE%D1%82%D0%B2%D0%B5%D1%82%D1%8B+%D0%BD%D0%B0+%D0%B1%D0%B8%D0%BB%D0%B5%D1%82%D1%8B+%D0%BF%D0%BE+%D0%B0%D0%BD%D0%B3%D0%BB%D0%B8%D0%B9%D1%81%D0%BA%D0%BE%D0%BC%D1%83+%D1%8F%D0%B7%D1%8B%D0%BA%D1%83+11+%D0%BA%D0%BB%D0%B0%D1%81%D1%81+%D0%B1%D0%B5%D0%BB%D0%B0%D1%80%D1%83%D1%81%D1%8C&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/6//4725/4725379_uchebnik__po__angliyskomu_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4725/4725475_obrazec__zhalobuy__v_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4725/4725598_oop__dou__v_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00059f49.bin
a57a394ab2069e07f1e9921095ce0fd5eb82f5d7e5426a5dc010e361a59b55af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59F49 9892 bytes
font_01_sfnt_off0005bb7d.bin
8eed2905c7598dd54b34c53f6f3a5c16d2417b4a334b41a1b215517114dd6ee4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB7D 13220 bytes

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