MALICIOUS
120
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious File
The file is an RTF document that contains embedded OLE objects, specifically triggering the RTF_EQUATION_EDITOR heuristic. This indicates the exploitation of a vulnerability within the Equation Editor component. The ".objupdate" directive further suggests that the OLE object is automatically activated upon opening the document, leading to code execution. While no specific script was extracted, the presence of these indicators strongly suggests the document is designed to exploit this vulnerability to download and execute a secondary payload.
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_off0000088d.bin428d651c9ce248a2f2d2b6cb3680f7a2ec4a9c44bbbe885b419ad8d57a2dd7b0 |
rtf-objdata-decoded | RTF \objdata at offset 0x88D | 1835 bytes |
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