MALICIOUS
121
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Phishing: Spearphishing Attachment
T1204.002 User Execution: Malicious File
T1059.001 Command and Scripting Interpreter: PowerShell
The sample is an RTF document that contains embedded OLE objects and triggers an update via \objupdate, indicating an attempt to exploit a vulnerability. Specifically, the RTF_EQUATION_EDITOR heuristic firing points to a known exploit targeting the Equation Editor component. This exploit likely leads to the download and execution of a second-stage payload, although no specific URLs or scripts were extracted to confirm this. The confidence is high due to the critical heuristic firing.
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_off00001a53.bin00184469f672ccc1ec7161ba8f1ed58d67311d4cbbdf81fd2adef03084914f3f |
rtf-objdata-decoded | RTF \objdata at offset 0x1A53 | 1857 bytes |
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