MALICIOUS
120
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.001 User Execution: Malicious Link
The sample is an RTF document containing embedded OLE objects, specifically triggering critical heuristics related to the Equation Editor vulnerability. The \objupdate directive indicates an attempt to automatically activate the embedded object upon opening. This strongly suggests the document is designed to exploit this vulnerability to download and execute a secondary payload, likely via a mechanism not fully detailed in the static analysis.
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_off0000163a.bin8cccc173ef3a76415945809f663d3c8ce3dad34d609129a911d10b1211144fcc |
rtf-objdata-decoded | RTF \objdata at offset 0x163A | 1605 bytes |
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