Malicious PDF — malware analysis report

Static analysis result for SHA-256 3633c58b7168aabd…

MALICIOUS

PDF

358.0 KB Created: 2015-08-24 03:19:42 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 2d0b5d317ea2c840206f820aff4fd383 SHA-1: c93a9c2d5e897e281e3390968b322d58f4dc6ad6 SHA-256: 3633c58b7168aabd111edcddeedfd5573ad44168a24bdfad12f66e695c50ad28
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link to a known malicious redirector, http://botcraftman.ru/. This heuristic firing, combined with the ML classifier's high confidence, indicates the document's intent is to lead the user to a harmful site. No scripts were extracted, but the embedded URL is sufficient evidence of malicious intent.

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%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%BF%D1%80%D0%BE%D0%B3%D1%80%D0%B0%D0%BC%D0%BC%D1%83+%D0%B4%D0%BB%D1%8F+%D1%80%D0%B8%D1%81%D0%BE%D0%B2%D0%B0%D0%BD%D0%B8%D1%8F+%D0%B0%D0%BD%D0%B8%D0%BC%D0%B5&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/6//4693/4693635_raspakovschik__faylov_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4695/4695378_koduy__oshibok__vektra_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4695/4695917_matlab__70__skachat_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005565b.bin
f71901beb13de324abc6beec1f9cbcf8045997ef26e31799b1bd42ee4f6c4795		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5565B 7608 bytes
font_01_sfnt_off00056c4c.bin
88360963ed15bfad263573f0473b427bf23621830f01da60aa0733107cd76f1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56C4C 14224 bytes

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