MALICIOUS
120
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
The sample is an RTF document that contains embedded OLE objects and specifically triggers the RTF_EQUATION_EDITOR heuristic. This indicates exploitation of a vulnerability within the Equation Editor component, a common vector for initial code execution. The RTF_OBJUPDATE heuristic further suggests that the embedded object is designed to be activated automatically. While no specific script or URL was extracted, the exploitation pattern strongly suggests the document's purpose is to download and execute a second-stage payload.
Heuristics 3
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Split hex Equation Editor ProgID + OLE object critical RTF_EQUATION_EDITORRTF embeds the Equation.3 ProgID as hex bytes near OLE object activation and splits the byte stream with whitespace or an ignorable RTF group. This is an Equation Editor OLE activation surface commonly used by CVE-2017-11882 / CVE-2018-0802 exploit documents.
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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 2 \objdata section(s) — embedded OLE objects
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
objdata_00_off00001700.bin4f2a3345fc826f286b1b521415576b262ab5c0ad92bc7b54266d995841cf9b8b |
rtf-objdata-decoded | RTF \objdata at offset 0x1700 | 1448 bytes |
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