Malicious RTF — malware analysis report

Static analysis result for SHA-256 7ce1267d28581278…

MALICIOUS

RTF

136.8 KB Created: 2017-09-21 01:55:00 First seen: 2017-10-10
MD5: ebc91b4e50c5101157553a0f8b4498f8 SHA-1: cfc900fd2db4b914e3538c6a7fa28bd6e2b0794a SHA-256: 7ce1267d2858127836f5503613bf4602c6a90531fcb132f8c7f5428fea76c795
202 Risk Score

Malware Insights

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

The RTF document contains a critical heuristic firing for CVE-2017-0199, indicating it is weaponized to exploit this vulnerability. It embeds a URL pointing to an HTA file, which is likely a second-stage payload. The presence of OLE object data further supports the exploitation of embedded objects within the RTF structure. The HTA file is expected to be executed, leading to further malicious activity.

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/ayviez.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_off00003002.bin rtf-objdata-decoded RTF \objdata at offset 0x3002 34504 bytes
SHA-256: f5d3cdf8cd9c09e601e04f67e95b0819a7eda0781972fa683094d95fb6540039

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