Malicious RTF — malware analysis report

Static analysis result for SHA-256 4c96801bf8f1e602…

MALICIOUS

RTF

64.7 KB Created: 2017-11-17 14:01:00 First seen: 2017-11-20
MD5: be02afe50da03bf9088bac73ebd4ce93 SHA-1: 25b2699e54374f8be9af0cf6c37df330bdd616e3 SHA-256: 4c96801bf8f1e60289598298ff2ffdf5e1dcda72b798ba35bc73eb8bf876711b
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 URL moniker exploitation. This exploit is designed to download and execute a secondary payload from the specified URL, http://107.167.10.47/Doc1.rtf. The presence of OLE object data and the specific CVE exploit strongly indicate malicious intent.

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 2 \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://107.167.10.47/Doc1.rtf In RTF body
    • http://schemas.microsoft.com/office/word/2003/wordmlIn RTF body

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00002a5b.bin rtf-objdata-decoded RTF \objdata at offset 0x2A5B 4908 bytes
SHA-256: 95b3e28fc920617cf599469c55531f497da983d4741ce9a281eef3a3436e35d0
objdata_01_off0000667b.bin rtf-objdata-decoded RTF \objdata at offset 0x667B 4948 bytes
SHA-256: d5e94417d69236c218f5f33b6a3dba8b4c5357108085167e4c8c251073446440

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