Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e84a9fb90893025…

MALICIOUS

PDF

366.5 KB Created: 2015-08-29 11:27:20 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6) First seen: 2021-11-25
MD5: a581abd2d150a21eb11eda5fb229ee2d SHA-1: 73d5bb6b5bb2d99a9b1fd3567de7987728c696d8 SHA-256: 4e84a9fb90893025c03c44ecf221c9e9d23c11c674f0039d80920ed97a2b695b
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'http://botcraftman.ru/'. This indicates the document's primary purpose is to lure the user to this malicious domain. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of PDF redirects often involves embedded JavaScript to trigger the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE+%D0%B8%D0%B3%D1%80%D1%83+%D0%B1%D0%B0%D1%80%D0%B1%D0%B8+%D0%BF%D0%BE%D0%BA%D0%B0%D0%B7+%D0%BC%D0%BE%D0%B4+2+%D0%BF%D0%BE%D0%BB%D0%BD%D0%B0%D1%8F+%D0%B2%D0%B5%D1%80%D1%81%D0%B8%D1%8F+%D1%87%D0%B5%D1%80%D0%B5%D0%B7+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8 In PDF document text
    • http://img0.liveinternet.ru/images/attach/c/7//4830/4830445_reshebnik_.pdfIn PDF document text
    • http://img1.liveinternet.ru/images/attach/c/7//4829/4829856_muy__chasto__govorim_.pdfIn PDF document text
    • http://img1.liveinternet.ru/images/attach/c/7//4829/4829895_na__kakoy__nomer_.pdfIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005753b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5753B 8032 bytes
SHA-256: 47966f579433da2178024b47d639fe1e007097ec1b226506e326ff4137af834c
font_01_sfnt_off00058ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58CE2 14372 bytes
SHA-256: 5f82276495b90a2f5794dde886cead9446e1d4fe6b892815b06479946c1fb314

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