Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ef6687e0f49420…

MALICIOUS

PDF

368.1 KB Created: 2015-08-28 11:37:36 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: f6e04401fc3e36405e8e9fd9c645abf9 SHA-1: 389e6c3f77fc2153c5b135b0de8e502a15f510f4 SHA-256: 05ef6687e0f4942077edf1394ea9d535bd5623fa706ff828277eeeee982170cb
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document that contains an embedded link identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence. The embedded link likely leads to a phishing or malware distribution site, attempting to lure the user into clicking it. No scripts were extracted, but the presence of a malicious redirector is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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%A4%D0%B8%D0%B7%D0%BC%D0%B8%D0%BD%D1%83%D1%82%D0%BA%D0%B8+%D0%B4%D0%BB%D1%8F+1+%D0%BA%D0%BB%D0%B0%D1%81%D1%81%D0%B0+%D0%B4%D0%BB%D1%8F+%D1%80%D1%83%D0%BA&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802377_doktor__kto__19631989_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802439_zhurnal__vuydachi__i_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802447_raspisanie__avtobusov__moskva_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00057b5e.bin
33e64e78554185800ddbad6da4945c10d13431d3d0a18667d86f1d03898af4d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57B5E 8312 bytes
font_01_sfnt_off0005931f.bin
616fa5a4bf920fb96485a4aff9e5dbc45fd0442f971ed3531c3f413e127885e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5931F 14348 bytes

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