Malicious PDF — malware analysis report

Static analysis result for SHA-256 7875ab5195877fd1…

MALICIOUS

PDF

349.1 KB Created: 2015-08-26 12:00:17 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 2fc7bc5661bcbb977f0d32b45ce52e19 SHA-1: 2d5a31bb6f941d014ccbacc29a5244b5c92a241a SHA-256: 7875ab5195877fd1ef9ba29a828f7e0df56a0329e97a8a559b7382e561b17957
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URL that is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated and unreadable, but the presence of a malicious redirector suggests the intent is to lure the user to a compromised site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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%84%D0%B8%D0%BB%D1%8C%D0%BC%D1%8B+%D0%B2+3d+%D1%84%D0%BE%D1%80%D0%BC%D0%B0%D1%82%D0%B5+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%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://img0.liveinternet.ru/images/attach/c/7//4754/4754134_mod__russkie__mashinuy_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4754/4754253_skachat__film__volchonok_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4754/4754437_obzh__v__kartinkah_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000528c9.bin
13b9a938ecd71e31b51ff6ec80a04c666770d0c352416d7f26981032e7f692fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x528C9 9980 bytes
font_01_sfnt_off00054471.bin
997abf5de1c0f42c55158d63f91711cc33ba794673d6c8fa0e8bc20900a9deba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54471 15556 bytes

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