MALICIOUS
120
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious File
The sample is an RTF document that contains embedded OLE object data, specifically targeting the Equation Editor. The RTF_EQUATION_EDITOR heuristic indicates that a PE file was decoded from the Equation Editor object, suggesting it's a dropper. The RTF_OBJUPDATE heuristic further confirms that the OLE object is designed to be activated, likely triggering the exploit. The document body is heavily obfuscated and does not provide clear textual lures, but the presence of these specific RTF heuristics strongly points to a known exploit chain for Equation Editor.
Heuristics 3
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Decoded Equation Editor payload + PE critical RTF_EQUATION_EDITORRTF decodes to an Equation Editor ProgID adjacent to OLE activation and the same decoded object stream contains embedded PE bytes. This matches the Equation Editor exploit surface used by CVE-2017-11882 / CVE-2018-0802 documents, while requiring payload evidence to avoid flagging benign Equation references.
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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_off00000bb0.bin3cf544c5dc0e978bcd69e68aa86635b5dc6b70b03d0e2c2516285b7e58e25b1d |
rtf-objdata-decoded | RTF \objdata at offset 0xBB0 | 2021 bytes |
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