MALICIOUS
140
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
T1566.001 Spearphishing Attachment
The RTF document contains critical heuristics indicating the presence of a vulnerable Equation Editor object, which is forced to activate via \objupdate. This exploit is commonly used to achieve arbitrary code execution. The embedded OLE object, objdata_00_off00000bf6.bin, is the likely component that facilitates this execution, potentially leading to the download of a secondary payload.
Heuristics 4
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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 1 \objdata section(s) — embedded OLE objects
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Embedded OLE object medium RTF_OBJEMBRTF contains \objemb — embedded OLE object
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
objdata_00_off00000bf6.bind1e7fe0732e25df8c4ce39e3c7e56875c2f90381f94d20a4dacbc941d956cf46 |
rtf-objdata-decoded | RTF \objdata at offset 0xBF6 | 1791 bytes |
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