Malicious RTF — malware analysis report

Static analysis result for SHA-256 4cf38d2bd4b6d38c…

MALICIOUS

RTF

39.4 KB Created: 2017-07-12 07:31:00 First seen: 2018-03-04
MD5: 1392a1cf5450d44527984099be47a003 SHA-1: 2a5158ff8d0fdaf195b65567cf168f56d54332f2 SHA-256: 4cf38d2bd4b6d38c37a19e4b739cb8691693f04549b22b5cf24d4b7f0a1b153c
202 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an OLE object that exploits CVE-2017-0199 to automatically download and execute an HTA payload from the URL https://jtabserver.org/bins/index.hta. This indicates a dropper functionality designed to deliver a second-stage malicious script.

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: Doc.Dropper.Agent-7188778-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-7188778-0
  • 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://jtabserver.org/bins/index.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_off00002782.bin rtf-objdata-decoded RTF \objdata at offset 0x2782 4664 bytes
SHA-256: c0cdff1145721de926f329392f2116cf23f79aa767e29c8bc306e7de9ace129c

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