MALICIOUS
160
Risk Score
Malware Insights
MITRE ATT&CK
T1204 Malicious Link
T1059 Command and Scripting Interpreter
The sample is an RTF document that contains embedded OLE objects, specifically targeting the Equation Editor. The presence of RTF_OBJAUTLINK and RTF_OBJUPDATE heuristics indicates that the embedded object is automatically activated upon opening, likely triggering an exploit. This exploit is designed to download and execute a secondary payload, leading to a compromise. The document body is heavily obfuscated and does not provide direct clues to the user-facing lure.
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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Automatically linked OLE object high RTF_OBJAUTLINKRTF contains \objautlink — an automatically linked OLE object surface that can be updated or activated when Word opens the document.
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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_off00001639.bin563406d6233016122e0c22ee131322f92b0cc1cb5694c45c29dbe65aff92e4aa |
rtf-objdata-decoded | RTF \objdata at offset 0x1639 | 1950 bytes |
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