Malicious RTF — malware analysis report

Static analysis result for SHA-256 11b803db5c6642f3…

MALICIOUS

RTF

116.8 KB Created: 2017-12-21 20:35:00 First seen: 2017-12-24
MD5: cb928fbce4ac2c5b1701a83e23da40d7 SHA-1: abc1cb5e1f3985d83c7a6dc13a51b53e5ec1b13e SHA-256: 11b803db5c6642f3f00b487b1f8438fd08f426ceaa7d84fdae07fc0a6fac5d8f
202 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains a weaponized URL exploiting CVE-2017-0199, which is designed to download and execute a second-stage payload. The embedded URL points to 'http://10.2.78.69:80/default.hta', indicating a likely attempt to deliver an HTA file for further malicious execution. The document body discusses computer virus prevention, which may serve as a lure.

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://10.2.78.69:80/default.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_off00015df5.bin rtf-objdata-decoded RTF \objdata at offset 0x15DF5 4560 bytes
SHA-256: 7d7c96621aaa92488c2904fe3d1b47e81e06e3f6c8f48bbb308b9295f11ecf37

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