Malicious PDF — malware analysis report

Static analysis result for SHA-256 398487fdda2145d6…

MALICIOUS

PDF

348.3 KB Created: 2015-08-28 17:26:02 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 80b1724f86b37f24058c883f85348feb SHA-1: 5d14974ab26035b931a407ea17f5b61c00978d83 SHA-256: 398487fdda2145d6903cedeff0ac7bb3b6a7bd565aa516bbc648bddb440f1466
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The ClamAV detection further confirms its malicious nature as a dropper. The primary IOC is the malicious URL, which is likely used to deliver a second-stage payload. No scripts were extracted, but the PDF structure and the malicious URL are sufficient indicators of malicious intent.

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-8793848-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8793848-0
  • 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%B5%D0%B2%D1%83%D1%88%D0%BA%D0%B0+%D1%81+%D1%82%D0%B0%D1%82%D1%83%D0%B8%D1%80%D0%BE%D0%B2%D0%BA%D0%BE%D0%B9+%D0%B4%D1%80%D0%B0%D0%BA%D0%BE%D0%BD%D0%B0+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%BA%D0%BD%D0%B8%D0%B3%D1%83+fb2&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4809/4809111_skachat__kaha__na_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4809/4809102_skachat__zvuk__hrusta_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00052a73.bin
c6a07070edc169d9b94f8284db22a825f2c099f036f142c3c08dfd74c878fd2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52A73 9124 bytes
font_01_sfnt_off00054482.bin
775a1857181a8ae77ec0fa8e2c04913fb13c0a3b2b0d9770999468227614192d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54482 14100 bytes

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