Malicious PDF — malware analysis report

Static analysis result for SHA-256 6650eaf91428e352…

MALICIOUS

PDF

355.0 KB Created: 2015-08-26 00:58:45 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 0c9916a80c7e531bcfb453b2f5aab318 SHA-1: 8d017f8365aadb68c2fc27175c1158032d5f45b3 SHA-256: 6650eaf91428e35203cbe2e91387c58d53d20e3022439dceea0199f67050c0eb
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded link to a known malicious redirector, botcraftman.ru. This heuristic firing, combined with the ML classifier's high confidence, indicates the document is designed to redirect users to a malicious destination. No scripts were extracted, but the presence of the malicious URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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%B0%D0%B2%D1%82%D0%BE%D0%BF%D1%80%D0%BE%D1%84%D0%B8+500+%D1%81%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+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4741/4741970_kak__pisat_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4742/4742974_federaciya__sheypinga_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4743/4743221_klyuch__fotoshop_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000543a9.bin
0254d41410198b12a2138fbfe2f89cdc1e0cbbee5aa15ed1f308e1eb5a8528d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x543A9 8212 bytes
font_01_sfnt_off00055bc3.bin
6419f0973744e5374767836614c16b6eff47901953f9a67e99a5243f093fae66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55BC3 15560 bytes

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