MALICIOUS
140
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious File
T1059.005 Visual Basic
The RTF file contains an embedded OLE object with a critical Equation Editor vulnerability, indicated by the RTF_EQUATION_EDITOR heuristic. The ".objupdate" directive suggests an attempt to automatically activate this object upon opening. The SE_ENABLE_LURE heuristic indicates the document likely prompts the user to enable content, a common tactic for macro-based malware delivery. The primary goal appears to be exploiting the Equation Editor to execute arbitrary code, likely to download and run a second-stage 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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Macro/content-enable lure medium SE_ENABLE_LUREDocument instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
objdata_00_off000046a3.binf6d862d808c8e8732f4fe6937fcb4c9172ac700a95d63f6bd6c3bd624db0dab0 |
rtf-objdata-decoded | RTF \objdata at offset 0x46A3 | 2212 bytes |
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