Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8f25cabe3231d37…

MALICIOUS

PDF

372.3 KB Created: 2015-08-25 22:19:16 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 155de92332f27d5e0cee0820f45ba245 SHA-1: 58857deb393787107402714900bd91b30141d1af SHA-256: f8f25cabe3231d373ae4416791e49ca05ebf63b96dcc963c183b3111f341ed7e
92 Risk Score

Malware Insights

MITRE ATT&CK
T1200 Hardware Add-in T1059 Command and Scripting Interpreter

The PDF file was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The embedded URL, http://botcraftman.ru/..., is associated with malicious activity. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine the exact lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9901

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%87%D0%B5%D1%80%D0%BD%D0%BE%D0%B1%D1%8B%D0%BB%D1%8C+%D0%B7%D0%BE%D0%BD%D0%B0+%D0%BE%D1%82%D1%87%D1%83%D0%B6%D0%B4%D0%B5%D0%BD%D0%B8%D1%8F+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE+%D0%B2+%D1%85%D0%BE%D1%80%D0%BE%D1%88%D0%B5%D0%BC+%D0%BA%D0%B0%D1%87%D0%B5%D1%81%D1%82%D0%B2%D0%B5&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4740/4740635_klyuchi__dlya__adguard_59_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4740/4740555_shema__opovescheniya__pri_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4740/4740632_skachat__parad__pobeduy_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00058845.bin
375609a39d564b586811cc6b2a947a066e10c3fbe87c6209dcb5474ec9189065		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58845 9408 bytes
font_01_sfnt_off0005a323.bin
8efbe80979cb0d1c32a3e12d8ea10b28ca9504aaf2cb7d393714ed1f5f1471a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A323 14656 bytes

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