Malicious PDF — malware analysis report

Static analysis result for SHA-256 f39a298d2077d3e2…

MALICIOUS

PDF

396.3 KB Created: 2015-08-28 17:25:43 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: b64094d4b7ffe072b9d2ebde7d4893ae SHA-1: afd42a04636bd8d106e26d136d04bbc15ba01e93 SHA-256: f39a298d2077d3e21cbd2bd810825ab55ff54aca3579048614d8d8987f7ee9f0
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to botcraftman.ru. This indicates the PDF is designed to lure users to a malicious site. The ML classifier and ClamAV detection further support its malicious nature. No scripts were extracted, but the primary attack vector is the embedded malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

Heuristics 3

  • 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.
  • ClamAV: Pdf.Dropper.Agent-8041585-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8041585-0
  • 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%BA%D0%BE%D0%BD%D1%82%D1%80%D0%BE%D0%BB%D1%8C%D0%BD%D0%B0%D1%8F+%D1%80%D0%B0%D0%B1%D0%BE%D1%82%D0%B0+%D0%BF%D0%BE+%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%BE%D0%BC%D1%83+%D1%8F%D0%B7%D1%8B%D0%BA%D1%83+8+%D0%BA%D0%BB%D0%B0%D1%81%D1%81+%D0%B2+%D1%84%D0%BE%D1%80%D0%BC%D0%B5+%D0%B3%D0%B8%D0%B0+2015&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4809/4809110_zayavlenie__na__remont_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4809/4809106_r24001__skachat__obrazec_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4809/4809102_skachat__zvuk__hrusta_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005e825.bin
680b44cc577e68d2c965190294a9c13c6461716e24b259c670caea7b57423d4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E825 9608 bytes
font_01_sfnt_off0006039b.bin
ff6884fbf6650a40feb7b19843b60335bebd1d2ee0c0e994728242ecf1d9b0f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6039B 14296 bytes

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