MALICIOUS
120
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.001 User Execution: Malicious Link
T1204.002 User Execution: Malicious File
The sample is an RTF document that contains embedded OLE object data, specifically targeting the Equation Editor. The RTF_OBJUPDATE heuristic indicates that the embedded object is designed to be activated automatically. This strongly suggests an exploit targeting a known vulnerability in the Equation Editor component, likely to achieve arbitrary code execution. The primary goal is presumed to be the download and execution of a secondary payload, although no specific payload details were extracted.
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_off000013da.bin4ba3ab0948a53de9c68328740cecc38e3b4cba76d77fd247875feba3c2dace27 |
rtf-objdata-decoded | RTF \objdata at offset 0x13DA | 1813 bytes |
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