Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf4c8bd5dcd02346…

MALICIOUS

PDF

364.3 KB Created: 2015-08-28 11:36:16 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: df919b6cd0099650509d56da85ad97b1 SHA-1: ec14247a6a2abff8cbcd9e488bab70ea88a73968 SHA-256: bf4c8bd5dcd02346dcf6ef8d13e26fb10aa477cd089f4e717aca374140b3e0dd
92 Risk Score

Malware Insights

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

The PDF file was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL, http://botcraftman.ru/..., is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware distribution site. No scripts were extracted, and the document body was unreadable, but the malicious URL is sufficient evidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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=80+%D0%B4%D0%BD%D0%B5%D0%B9+%D0%B2%D0%BE%D0%BA%D1%80%D1%83%D0%B3+%D1%81%D0%B2%D0%B5%D1%82%D0%B0+%D0%B8%D0%B3%D1%80%D0%B0+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802384_skachat__prilozhenie__dlya_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802411_opera__mini__skachat_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00056797.bin
b29b455c9414af2a43a3ab79bed0adb99acfa6d68aeb416bb43ba0d16e218928		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56797 8552 bytes
font_01_sfnt_off0005805f.bin
1054f4975b169c257f7168ab0b0fee0bb12a8079cb45263e71c64971cc5d0692		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5805F 16236 bytes

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