Malicious RTF — malware analysis report

Static analysis result for SHA-256 80aecdd6657fba63…

MALICIOUS

RTF

170.2 KB Created: 2017-08-03 14:23:00 First seen: 2017-08-08
MD5: f50a96215ea6e57ed1209f45faf66c75 SHA-1: 15e71a76df4accc170b3088ccb3945e32d85b970 SHA-256: 80aecdd6657fba63db4f1b1bbf5477f766e114643a409468231ae8a1d1dff993
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 remote code execution. The exploit is configured to download and execute an HTA file from the URL https://a.pomf.cat/nyxeve.hta. This indicates a downloader or dropper pattern, aiming to execute a second-stage 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.
  • 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.mic In RTF body
    • https://a.pomf.cat/nyxeve.htaIn RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off0000295d.bin rtf-objdata-decoded RTF \objdata at offset 0x295D 17548 bytes
SHA-256: acc97474620b07a6db5629d456b99dbc11021d6eafe3cce80eeea3c0d5704aa7

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