Malicious PDF — malware analysis report

Static analysis result for SHA-256 495d689f28c0f276…

MALICIOUS

PDF

340.7 KB Created: 2015-08-23 22:35:11 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: ad88906c55a2312ddaac5eb5edcc7dd2 SHA-1: 5da4946a102b4d6f003d38fc33300649f3dca084 SHA-256: 495d689f28c0f27640f78bab285ec6bdcc94f142f81388f5c023f72b23082bf4
90 Risk Score

Malware Insights

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

The PDF file was flagged by a critical heuristic for linking to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The embedded URL points to botcraftman.ru, which is identified as a malicious redirector. No scripts were extracted, and the document body was heavily obfuscated, preventing a deeper analysis of its specific lure. The primary attack vector appears to be directing the user to a malicious site via the embedded link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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=bdrip+%D0%BF%D1%80%D0%BE%D0%B8%D0%B3%D1%80%D1%8B%D0%B2%D0%B0%D1%82%D0%B5%D0%BB%D1%8C+%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://img1.liveinternet.ru/images/attach/c/6//4691/4691351_skachat__igru__simulyator_.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4690/4690264_autoaccepter__dota__2_.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4690/4690910_skachat__igru__zheleznuyy_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00050ce5.bin
37a6c7f14c9564cac73f37848d2076797d21e8e870ff721ec2e6b12ffd50c34c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50CE5 10196 bytes
font_01_sfnt_off000528b9.bin
270e5ad01f39363d599cf835159d4bb630a4f82702ea0c8c392a409983e8712a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x528B9 14316 bytes

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