Malicious RTF — malware analysis report

Static analysis result for SHA-256 99a877229fc767c1…

MALICIOUS

RTF

43.3 KB Created: 2017-10-11 11:07:00 First seen: 2017-10-28
MD5: 9e9fdae1e42ec0076c678f293b04fe9f SHA-1: 3a2921fbd5f21fe8f90015f216a17b855df5cc10 SHA-256: 99a877229fc767c1f2d0639ff1704f951f39194d7a6179097ec7bf06f5f91be3
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 the embedded URL http://a.pomf.cat/vaakgt.hta, which is likely to host a second-stage payload. This indicates a malicious document designed to deliver further malware.

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 http://a.pomf.cat/vaakgt.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_off00002754.bin rtf-objdata-decoded RTF \objdata at offset 0x2754 4664 bytes
SHA-256: 13b765e5da575912267a8b68a3cbe53f3336125c898eb4814c5d375c21e0d4ca

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