Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f8d82c83a684da7…

MALICIOUS

PDF

358.8 KB Created: 2015-08-25 09:16:42 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: af914b3308e4bb2ac6f7fb8effc8397c SHA-1: 4ae3a1adcaa1a50b5f5a87d53dd6646d6dd987e9 SHA-256: 6f8d82c83a684da7a4aaae09ffbb242f856a7acb7bb9c09a90b7213c90102ed4
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector infrastructure, indicating an attempt to lure the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious URL is sufficient evidence for this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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+%D0%B8%D0%B3%D1%80%D1%83+%D1%81%D0%BE%D0%BB%D0%B4%D0%B0%D1%82+%D1%83%D0%B4%D0%B0%D1%87%D0%B8+%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
    • http://img1.liveinternet.ru/images/attach/c/6//4725/4725972_godovuye__kontrolnuye__rabotuy_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4725/4725846_skachat__igru__lego_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4725/4725163_skachat__konsultant__plyus_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00055c3e.bin
d325eed5c03073775e73a6c5861ce31b85ddcb5b406a485edc61cdccd9a1138e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55C3E 7904 bytes
font_01_sfnt_off00057307.bin
89f04fb4a6020445c45d4f77a2e6955dea88bb7fdb2664e86b05f86379b0cdf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57307 12712 bytes

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