Malicious RTF — malware analysis report

Static analysis result for SHA-256 8a03bb1cf5f69e9c…

MALICIOUS

RTF

1.79 MB Created: 2017-07-13 06:19:00 First seen: 2018-03-04
MD5: 289aaf6151178d4cac8e294484eb12a0 SHA-1: dd003aa3f6705f9cc14b15c3ee79856fe7ec18a4 SHA-256: 8a03bb1cf5f69e9c438262e977ff455dc5af962fdeb68e4eeee41688103433a3
182 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an OLE object with a weaponized URL exploiting CVE-2017-0199. This URL, ftp://ftpsommelier:hos1057@residenzailsommelier.com/httpdocs/template.hta, is used to download and execute a second-stage payload. The presence of excessive hex-encoded data within the OLE object further suggests the hiding of a malicious payload.

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.
  • 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.
  • Large hex data blocks in OLE object high RTF_EXCESSIVE_HEX
    RTF contains ~1840KB of hex-encoded data inside \objdata sections — may hide a payload
  • 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://kaloderma.ca/uag.php 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_off00002a57.bin rtf-objdata-decoded RTF \objdata at offset 0x2A57 4672 bytes
SHA-256: 7237d40a775cbeda0928d14e0e8782e8a0478ebff4f84fc3cc59bd609bbe53be

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