Malicious PDF — malware analysis report

Static analysis result for SHA-256 a72f318ceef22017…

MALICIOUS

PDF

301.5 KB Created: 2015-08-26 10:33:46 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: f20b283dabee94314a22e1e06a74669c SHA-1: 112acf7cca2d9a497e8a0712a9989a6a4d2d6985 SHA-256: a72f318ceef22017b6dffeed045eb23363bebd154af1c902d09cfb412df7ba8e
90 Risk Score

Malware Insights

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

The PDF contains an embedded link to a known malicious redirector, botcraftman.ru. This indicates an attempt to lure the user to a harmful site. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7490

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+ballance&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4752/4752624_vuyhodil__na__polya_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751792_aviacionnuyy__navigator__dlya_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4752/4752592_videokurs__francuzskogo__yazuyka_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00046df8.bin
38e835dec523d6e0e22fdb49479fc409c7988edaf93cf657b7a4982218789c5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46DF8 8176 bytes
font_01_sfnt_off000484b4.bin
e02bfcfd32076c19c805fa527c90d9dbe44222215bd5c34e6ed9c96e820ebda1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x484B4 16372 bytes

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