Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4be46f5249e5d75…

MALICIOUS

PDF

379.1 KB Created: 2015-08-28 18:06:50 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: fb5fbbfee5460e2ff8e0eaf121d56df1 SHA-1: d429e75066b69e78d6ef48d7e3a1a9237b8a768d SHA-256: d4be46f5249e5d75653821ce8de432f276f72ea7e58c975e593238481e0b0281
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as malicious, including a critical finding for a link to known malicious redirector infrastructure. The primary malicious IOC is the URL http://botcraftman.ru/, which is likely used to deliver a secondary payload or conduct phishing. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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-8149338-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8149338-0
  • 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=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D1%84%D0%BE%D1%80%D1%81%D0%B0%D0%B6+5+%D0%BC%D0%BF4&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4809/4809388_skachat__igru__pingvinuy_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4809/4809788_skachat__filmuy__na_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4809/4809347_skachat__universalnuye__klyuchi_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005a4ac.bin
527ebffbde3c6607e748a64a521d1a897efba7e2a14f713f8a7854d1a8b94343		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A4AC 8480 bytes
font_01_sfnt_off0005bd5d.bin
2184082a5006393de5952d0d39b35af809b74cc03716e6c0ce84f21790d8e3dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD5D 14992 bytes

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