Malicious RTF — malware analysis report

Static analysis result for SHA-256 4295338b668f979f…

MALICIOUS

RTF

2.98 MB Created: 2017-10-26 12:52:00 First seen: 2017-10-28
MD5: 527f5eb301d91c0efd8a6a6b0fdd6761 SHA-1: e688558ae60a9009cd2f75079de18f53b0228dd4 SHA-256: 4295338b668f979fa57c3568a2619623fb320a5bba0806592a726bfd2e4baf1e
262 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains critical heuristic firings for CVE-2017-0199 and CVE-2023-21716, indicating exploitation of vulnerabilities in RTF parsing. The embedded URL https://a.pomf.cat/hlrouv.hta is likely used to download and execute a second-stage payload, such as an HTA file. The presence of OLE object data and presentation streams further supports the exploitation of embedded objects within the RTF.

Heuristics 7

  • 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.
  • CVE-2023-21716 — \fonttbl with 32768 entries critical CVE exact CVE_2023_21716
    RTF font table contains 32768 font entries, which is highly anomalous — CVE-2023-21716 triggers a heap buffer overflow in Word's RTF font table parser when the number of entries is very large (exploitable from ~32768 entries). This document is suspicious.
  • 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://a.pomf.cat/hlrouv.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_off002f391b.bin rtf-objdata-decoded RTF \objdata at offset 0x2F391B 4664 bytes
SHA-256: 0540f1ef4777cc40945e714f41653ce82d822bc07aba3f8550a841dc1c70e717

Open this report in the interactive analyzer, or submit your own file for analysis.