Malicious RTF — malware analysis report

Static analysis result for SHA-256 9761c2b2d7210a93…

MALICIOUS

RTF

52.3 KB Created: 2017-09-19 09:46:00 First seen: 2017-10-10
MD5: b3af2236886c0bca6a6db1728735692a SHA-1: edd6d201d0764f7234e72c0ff50c22b260894677 SHA-256: 9761c2b2d7210a937101d291e3cd1c87aaee0ffb029f3cce1035621dbc17d95b
202 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF file contains OLE object data and triggers critical heuristics for CVE-2017-8759, indicating exploitation via a SOAP Moniker. This vulnerability allows for remote code execution, likely to download and execute a secondary payload. The presence of OLE objects and automatic linking further supports the exploitation vector.

Heuristics 6

  • SOAP Moniker — CVE-2017-8759 (SOAP WSDL RCE) critical CVE related CVE_2017_8759
    RTF \objdata decodes to OLE data containing the SOAP Moniker — CVE-2017-8759 (SOAP WSDL RCE) CLSID — the vulnerable control/moniker is embedded directly in the document's object stream, the delivery shape of this exploit. RTF objects auto-render when Word opens the file.
  • ClamAV: Rtf.Downloader.CVE_2017-6336326-3 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Rtf.Downloader.CVE_2017-6336326-3
  • Automatically linked OLE object high RTF_OBJAUTLINK
    RTF contains \objautlink — an automatically linked OLE object surface that can be updated or activated when Word opens the document.
  • OLE object data medium RTF_OBJDATA
    RTF contains 1 \objdata section(s) — embedded OLE objects
  • OlePres presentation stream in RTF OLE object medium RTF_OLEPRES_STREAM
    RTF contains an embedded OLE object with an OlePres presentation stream. OlePres is an OLE presentation marker and is not enough on its own to identify CVE-2025-21298.
  • 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://schemas.microsoft.com/offi In RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00003cb4.bin rtf-objdata-decoded RTF \objdata at offset 0x3CB4 3714 bytes
SHA-256: 40bcb1fa2237187a12cfe0e6dfa270b6eefaa0a742337ccd713d3a133da28eec

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