Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a22df97f43d2b90…

MALICIOUS

PDF

365.3 KB Created: 2015-08-28 11:54:28 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: b6561f0da2dcc28ad6072bd68a808386 SHA-1: 9c146b6add06772516af10c229282505cbb98e13 SHA-256: 3a22df97f43d2b908dacd9a27038074453041835bd7521464d8acddbf0d6c38c
90 Risk Score

Malware Insights

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

The PDF contains a link to known malicious redirector infrastructure at http://botcraftman.ru/. This heuristic firing, combined with the ML classifier's high confidence, indicates the document is designed to redirect users to a harmful site. The document body's garbled text and the PDF metadata suggest it was generated by wkhtmltopdf, a common tool for creating PDFs from web content, which could have been used to package the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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%A1%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+casio+g+shock+wr20bar+%D0%B8%D0%BD%D1%81%D1%82%D1%80%D1%83%D0%BA%D1%86%D0%B8%D1%8F&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802443_welcome__3__skachat_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802408_flash__player___.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802518_skachat__video__valyusha_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005657b.bin
378b8a223757cf5854f2ca15d8a47c4522815b16d3f27007b408a70979730ff3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5657B 10584 bytes
font_01_sfnt_off000582a5.bin
77629ac8eb66a4534f339d66ff6d0fc06e2c6479ddbd42ef039c70ec1f136ad5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x582A5 16940 bytes

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