Malicious RTF — malware analysis report

Static analysis result for SHA-256 5e26acb99b353550…

MALICIOUS

RTF

453.0 KB Created: 2017-10-31 17:49:00 First seen: 2017-11-13
MD5: 60f3a61b7ecd882372e52cdef8ce2b89 SHA-1: 290a77081b71d15f655a7463c759e70befac8ef5 SHA-256: 5e26acb99b35355040effc340b204bba3babf9d0fe3519983be02a1c234bc578
202 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains an OLE object that exploits CVE-2017-0199, a known vulnerability for client execution. This exploit is weaponized with a URL pointing to an HTA file, which is likely a second-stage payload. The embedded URL is confirmed to be malicious and is the primary indicator of compromise.

Heuristics 6

  • CVE-2017-0199 (OLE2Link / weaponized URL) critical CVE exact CVE_2017_0199_WEAPONIZED_URL
    RTF contains a URL Moniker OLE link to a script/HTA/template-style remote loader, matching the tighter static CVE-2017-0199 shape.
  • 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 https://a.pomf.cat/diwlcm.hta In RTF body
    • http://schemas.microsoft.com/office/word/2003/wordmlIn RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00068df8.bin rtf-objdata-decoded RTF \objdata at offset 0x68DF8 4664 bytes
SHA-256: 3a2ad036d2b6fbd91324a96d51a19611832754a1d1d888b9c6f95128210313e3

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