Malicious PDF — malware analysis report

Static analysis result for SHA-256 b97f37f72d4965c0…

MALICIOUS

PDF

366.3 KB Created: 2015-08-28 11:39:11 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: d2cef3f2819f665c8cecd519687d0439 SHA-1: 0b88337a76cb23b8eb23dcae6aa2b7aa0fc02bf0 SHA-256: b97f37f72d4965c0cfa97b20dac65e0c5e221d9fe32938943c133166334017f6
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical alert for a malicious redirector link and a machine learning classifier. The embedded URL points to a suspicious domain, indicating a likely attempt to lure the user to a malicious site. No scripts were extracted, but the PDF structure and the redirector link strongly suggest a delivery mechanism for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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-9289035-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9289035-0
  • 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%B4%D0%BE%D0%BC%D0%B5%D0%BD%D0%BD%D1%8B%D0%B5+%D1%81%D0%BB%D1%83%D0%B6%D0%B1%D1%8B+active+directory+%D1%81%D0%B5%D0%B9%D1%87%D0%B0%D1%81+%D0%BD%D0%B5%D0%B4%D0%BE%D1%81%D1%82%D1%83%D0%BF%D0%BD%D1%8B+windows+7&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802359_panorama__romanov__o_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802498_teksturuy__dlya__minecraft_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802416_maynkraft__1__5_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00056b22.bin
52a812600393922c9b746964c4788fa3319f1bec7ffa4dfb3dd9c308d2c14949		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56B22 10704 bytes
font_01_sfnt_off000588ac.bin
76b9b3365cf5459198fe1a4f43ad3838daae9770e3fa0b9a147c1e01dbcea6f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x588AC 16276 bytes

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