MALICIOUS
140
Risk Score
Malware Insights
MITRE ATT&CK
T1204 Malicious Link
T1204.002 Malicious File
The sample is an RTF document containing an embedded OLE object, specifically targeting the Equation Editor vulnerability. The presence of \objupdate indicates an attempt to force activation of the embedded object, which is likely to trigger the exploit. This exploit is known to download and execute a second-stage payload, hence the high confidence in a malicious attack pattern.
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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Embedded OLE object medium RTF_OBJEMBRTF contains \objemb — embedded OLE object
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
objdata_00_off00001f75.bin9619c16fe9633710b90e567beb0b8396eeb9db0902bc6b011b28b205792c7762 |
rtf-objdata-decoded | RTF \objdata at offset 0x1F75 | 1934 bytes |
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