Malicious PDF — malware analysis report

Static analysis result for SHA-256 b31868765c2ef961…

MALICIOUS

PDF

353.9 KB Created: 2015-08-29 11:50:47 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6) First seen: 2021-07-07
MD5: 4f3b032f36c0ca7341f06db9034b2814 SHA-1: 7e9e5a877890eb1dc44cbe4fa6cbd7aad14cea11 SHA-256: b31868765c2ef961419ea674f90120e77c35c28e9f9f85f8c75e0db80309723b
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, http://botcraftman.ru/..., is associated with malicious activity. While no scripts were extracted, the presence of a malicious redirector strongly suggests the document is designed to lure users to a harmful site, likely for phishing or malware delivery.

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%BE%D0%B1%D0%BB%D0%BE%D0%B6%D0%BA%D0%B8+%D0%B4%D0%BB%D1%8F+aimp+3+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE&charset=utf-8 In PDF document text
    • http://img1.liveinternet.ru/images/attach/c/7//4829/4829811_mstiteli__2_.pdfIn PDF document text
    • http://img1.liveinternet.ru/images/attach/c/7//4829/4829897_skachat__maynkraft__s_.pdfIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/7//4830/4830611_kalendarno__tematicheskoe__planirovanie_.pdfIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000544c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x544C4 8488 bytes
SHA-256: 31d641e38628680267fe973e9a15ba0d239b7b6a56afc680ad878d21b7400141
font_01_sfnt_off00055c76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55C76 14188 bytes
SHA-256: e7ead4fb7ee155cb1b86eb9310f5b03a24b5d9c29fe807b643027134f5e2e010

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