MALICIOUS
160
Risk Score
Malware Insights
MITRE ATT&CK
T1204 Malicious Link
T1204.001 Malicious Link: Malicious Link
T1059 Command and Scripting Interpreter
The RTF document contains embedded OLE objects and triggers OLE activation via \objupdate, indicating an attempt to exploit vulnerabilities. Specifically, the critical CVE-2017-8759 heuristic firing confirms the exploitation of MSXML SAX OLE activation. This technique allows for arbitrary code execution, likely to download and run a secondary payload.
Heuristics 5
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CVE-2017-8759 — MSXML SAX OLE activation critical CVE likely CVE_2017_8759RTF contains a hex-encoded OLE1 object for Msxml2.SAXXMLReader.6.0 followed by an embedded OLE compound document, and the document requests OLE activation. This matches the RTF staging shape used for CVE-2017-8759 SOAP/WSDL parser code injection.
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\objupdate forces OLE activation high RTF_OBJUPDATERTF contains \objupdate — forces automatic OLE object instantiation when the document is opened, bypassing user interaction. Almost exclusively seen in Equation Editor exploit documents.
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OLE object data medium RTF_OBJDATARTF contains 3 \objdata section(s) — embedded OLE objects
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Embedded OLE object medium RTF_OBJEMBRTF contains \objemb — embedded OLE object
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OlePres presentation stream in RTF OLE object medium RTF_OLEPRES_STREAMRTF 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.
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
objdata_00_off00003137.binae053b1ce288fa6c8e8ed1fd6dd3f841fdaa8faa8040e8e1a75550c19d97c7fa |
rtf-objdata-decoded | RTF \objdata at offset 0x3137 | 127534 bytes |
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