Malicious PDF — malware analysis report

Static analysis result for SHA-256 65413312ebb97f73…

MALICIOUS

PDF

343.9 KB Created: 2015-08-29 11:29:45 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6) First seen: 2021-11-24
MD5: 7c52e5b1e4c53aae07c902927f73753c SHA-1: ee40017d42484b2c7962a4a90045a9c7cfbcc6db SHA-256: 65413312ebb97f7354e5c004d1b6ddf8240f433392c12f8b195a9f3635902966
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a link to known malicious redirector infrastructure. The ML classifier also strongly flagged the document as malicious. While no scripts were extracted, the presence of a malicious URL suggests an attempt to lure the user to a compromised site, likely for further exploitation or credential harvesting.

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=%D0%B2%D0%B5%D0%B3%D0%B0%D1%81+%D0%BF%D1%80%D0%BE+11+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C&charset=utf-8 In PDF document text
    • http://img0.liveinternet.ru/images/attach/c/7//4830/4830106_kleevuye__mastiki__domashnego_.pdfIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/7//4830/4830460_sony__vaio__svp132a1cv_.pdfIn PDF document text
    • http://img1.liveinternet.ru/images/attach/c/7//4829/4829985_kinoteatr__dzhalil__nizhnekamsk_.pdfIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000517c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x517C4 8040 bytes
SHA-256: 4594cedb3d333112de8a1d652e8de221704a28236a7294738cd8a2623c7b070b
font_01_sfnt_off00052f32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52F32 16160 bytes
SHA-256: f838a0ccbc4a683cd7dafb39308153870b0feb17c790aebbc6a9df9d36dd8e1e

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