Malicious RTF — malware analysis report

Static analysis result for SHA-256 5125ce95d3362757…

MALICIOUS

RTF

40.9 KB Created: 2017-09-25 08:40:00 First seen: 2017-10-10
MD5: 8bf3cdf8a5b73eb0321f5bfd6963e76d SHA-1: 2f6bab91d76c1d734c8f7bf7c8680378a30bd377 SHA-256: 5125ce95d33627575ef4e100fb0132f044a59ee2c07e52d9260352eac06f3a09
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 URL https://fex.net/load/029560151052/54268368 to download and execute a secondary payload. This indicates a likely spearphishing attachment used to deliver malware.

Heuristics 6

  • CVE-2017-0199 (OLE2Link / remote URL Moniker) critical CVE likely CVE_2017_0199
    RTF contains a URL Moniker OLE link whose decoded target is remote. Office can fetch and process the response through the CVE-2017-0199 OLE2Link attack path, but the server-side content type is not proven statically.
  • 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://schemas.microsoft.com/office/word/2003/wordml In RTF body
    • https://fex.net/load/029560151052/54268368In RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00002d1d.bin rtf-objdata-decoded RTF \objdata at offset 0x2D1D 4664 bytes
SHA-256: a5f9eaba22663c5734688ce4bfc145d7c4c5b9c0e92025e9ccaa4241139981e4

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