MALICIOUS
160
Risk Score
Malware Insights
MITRE ATT&CK
T1204 Malicious Link
T1204.001 Malicious Link: Malicious Link
T1059 Command and Scripting Interpreter
T1566 Phishing
T1566.001 Phishing: Spearphishing Attachment
The sample is an RTF document containing an OLE object that exploits the Equation Editor vulnerability. The presence of RTF_OBJDATA, RTF_OBJAUTLINK, and RTF_OBJUPDATE heuristics strongly indicates the exploitation of a known vulnerability to trigger the execution of embedded malicious content. This pattern is commonly used to download and execute a second-stage payload.
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 1 \objdata section(s) — embedded OLE objects
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
objdata_00_off00000d2e.bin3a712b399c758f4fe8811fc87f7368df8708550fc003091eff9b2b1af16c30ec |
rtf-objdata-decoded | RTF \objdata at offset 0xD2E | 1654 bytes |
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