Malicious RTF — malware analysis report

Static analysis result for SHA-256 a42bfb8002b4c3fe…

MALICIOUS

RTF

122.9 KB Created: 2017-09-14 11:42:00 First seen: 2017-10-10
MD5: 6c58d441a5bd4aafab246b987938b2f6 SHA-1: ac80eefe5dc664fdf34cc67fc8ddbd547e0c1fa8 SHA-256: a42bfb8002b4c3fe94af842599cf0c9a8d0d86915f81ef45e69054e083a1b00b
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, a critical vulnerability allowing for remote code execution. The exploit targets a URL that downloads a HTA file, which is likely a second-stage payload. The presence of the weaponized URL and the OLE object strongly indicate malicious intent.

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://klotshop.tech/media/cms/craft.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 34734 bytes
SHA-256: f37635028ec4b77a1f57e8c103a3980738ddb8a923ef1d4a06945a50b30d35bf

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