Malicious PDF — malware analysis report

Static analysis result for SHA-256 31b7f9bcd8160a68…

MALICIOUS

PDF

346.8 KB Created: 2015-08-28 11:34:04 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: f873a63f04125ab39af88c37993e55b6 SHA-1: 4a4bf1e3a0d0e80ab1c1313381a891cc613d06df SHA-256: 31b7f9bcd8160a68c6016dba4e06b53cf433b15caadb6951947c504e9eb340dc
90 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/. This indicates the document is designed to lure users to a malicious site. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, and the document body was heavily obfuscated and truncated, preventing further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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%84%D0%BE%D1%80%D0%BC%D0%B0+182-%D0%BD+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802386_skachat__gta_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802363_detali__mashin__i_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802420_skachat__besplatno__igru_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005265b.bin
dbd056290bfc60a349f1609a24a0125a7c69c16dfcf458cee872d1dff231801a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5265B 8740 bytes
font_01_sfnt_off00053f10.bin
1ac6da1aecd93f229242490c92979382944cd339e3fe4856dba2792e0106b721		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53F10 14096 bytes

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