MALICIOUS
129
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Phishing: Spearphishing Attachment
T1204.002 Malicious File Execution: Malicious Code
The sample is an RTF document containing an embedded OLE object, specifically targeting the Equation Editor vulnerability (RTF_EQUATION_EDITOR). The ".objupdate" heuristic indicates that the embedded object is designed to be activated automatically, likely to trigger the exploit. The extracted artifact "objdata_00_off0000173a.bin" is suspicious and likely contains the exploit code or a secondary payload. The overall attack pattern suggests a phishing lure designed to exploit this vulnerability for initial execution.
Heuristics 4
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Equation Editor CLSID critical RTF_EQUATION_EDITOREquation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
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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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Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGEOne or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
objdata_00_off0000173a.binbdff69cc7eb44021a757da5b7bbec4a2889b09784b66bd8571e37f5f95c2ec7e |
rtf-objdata-decoded | RTF \objdata at offset 0x173A | 349245 bytes |
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Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
Carved artifact entropy is 7.99, consistent with packed or encrypted content.
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