MALICIOUS
120
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious File
The RTF document contains an embedded OLE object with decoded Equation Editor payload, indicating a likely exploit. The \objupdate directive suggests that the OLE object is automatically activated upon opening, leading to the execution of the embedded Portable Executable (PE) file. This is a common delivery mechanism for malware.
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 1 \objdata section(s) — embedded OLE objects
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
objdata_00_off00000065.bin7719e6a328cdfe70d17ec940d518e4cd07b34f8246b9fde8fb25566b2fcf528f |
rtf-objdata-decoded | RTF \objdata at offset 0x65 | 1856 bytes |
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