Malicious RTF — malware analysis report

Static analysis result for SHA-256 af0877ddbae00523…

MALICIOUS

RTF

76.2 KB Created: 2017-09-26 15:15:00 First seen: 2017-10-10
MD5: db472c7eb3a2bdad0a4de2533c85d857 SHA-1: 5c77565ab097a8c24d634f0d500dc935145a12bb SHA-256: af0877ddbae00523054431046d3935dfab6053ae3da551d478885000a081c43c
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 is flagged for the critical CVE-2017-8759 vulnerability, which allows for Remote Code Execution via SOAP Moniker. This indicates the file is designed to exploit this vulnerability to download and execute a secondary payload. The document body content appears to be unrelated to the malicious functionality.

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/office/word/2003/wordml In RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off0000272e.bin rtf-objdata-decoded RTF \objdata at offset 0x272E 5808 bytes
SHA-256: ecd07f1f00abe5b54f55841f3a2f2df29207b37992b108d3d6da4e8a65aaa672

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