Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1e4989a7390d5b6…

MALICIOUS

PDF

347.3 KB Created: 2015-08-28 11:33:01 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 2d919959acbcd2c62721729732626e7f SHA-1: 54f3c5bf368c3936eff9b3b7c1d55d1f98b248f2 SHA-256: b1e4989a7390d5b65c65632b31c1c9aa9bb13b873094816cbcc074cf04e542d3
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure at botcraftman.ru. This indicates the file is designed to lure users to a potentially harmful website. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted, but the embedded URL is sufficient evidence for a malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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-9093013-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9093013-0
  • 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%BF%D0%B0%D1%80%D1%82%D0%BD%D0%B5%D1%80%D1%81%D0%BA%D0%B8%D0%B5+%D0%BF%D1%80%D0%BE%D0%B3%D1%80%D0%B0%D0%BC%D0%BC%D1%8B+%D0%B8%D0%BD%D1%82%D0%B5%D1%80%D0%BD%D0%B5%D1%82-%D0%BC%D0%B0%D0%B3%D0%B0%D0%B7%D0%B8%D0%BD%D0%BE%D0%B2&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802416_maynkraft__1__5_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802374_stalker__misery__201_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802379_skachat__deadpool_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000526e6.bin
fd66864d8331abc5422b043958ef9a09ca1e7d67de298a4e482568ffda0f0e03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x526E6 7860 bytes
font_01_sfnt_off00053d4f.bin
af31085976333a8b96d7f6d5017b3ca99e9d72049de8e210c111ba320096b00b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53D4F 16004 bytes

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