Malicious RTF — malware analysis report

Static analysis result for SHA-256 223622c2dcf33b0e…

MALICIOUS

RTF

43.3 KB Created: 2017-09-11 First seen: 2017-09-14
MD5: 5f7a1ae121480d05b89ce88df04f6242 SHA-1: 62323d3e42ab23ae185b5fe000ec774efed8326b SHA-256: 223622c2dcf33b0e005608aa19c9cf017d21511d1d848e0f2bde9ed03c1f74cd
202 Risk Score

Malware Insights

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

The RTF file contains an OLE object that exploits CVE-2017-0199, a known vulnerability for remote code execution. The exploit targets a URL that likely hosts a second-stage payload. The presence of OLE object data and automatic linking further supports the exploitation vector.

Heuristics 6

  • CVE-2017-0199 (OLE2Link / remote URL Moniker) critical CVE likely CVE_2017_0199
    RTF contains a URL Moniker OLE link whose decoded target is remote. Office can fetch and process the response through the CVE-2017-0199 OLE2Link attack path, but the server-side content type is not proven statically.
  • ClamAV: Rtf.Exploit.CVE_2017_0199-6335035-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Rtf.Exploit.CVE_2017_0199-6335035-0
  • 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
    • https://fex.net/load/680365386172/44719985In RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00002748.bin rtf-objdata-decoded RTF \objdata at offset 0x2748 4664 bytes
SHA-256: 37aca0430748f7da21e8190bfd100b541a561980c540f352c1d43617be2faa93

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