Malicious RTF — malware analysis report

Static analysis result for SHA-256 77bc03847b6dbdb8…

MALICIOUS

RTF

39.3 KB Created: 2017-07-13 10:28:00 First seen: 2018-03-04
MD5: 2cb147dbd2f09aaf8541208cd343dcd2 SHA-1: 3194c89ab534749b92298fdd09330a9c868bd255 SHA-256: 77bc03847b6dbdb848af106d74fe438807283e83c55d6e6dbfb044fc604f24ed
202 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains a weaponized URL exploiting CVE-2017-0199, which is a critical vulnerability allowing for remote code execution. The embedded URL, http://happypersontyme.ga/test/kass.hta, is highly suspicious and likely serves as a dropper for a secondary payload. The presence of OLE object data further supports the exploitation vector.

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://happypersontyme.ga/test/kass.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_off00002761.bin rtf-objdata-decoded RTF \objdata at offset 0x2761 4664 bytes
SHA-256: ce14f6bcd2b62974f014e5c7a476502151e1da570572091b90e1447621f43225

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