MALICIOUS
182
Risk Score
Malware Insights
MITRE ATT&CK
T1204 Malicious User Execution
T1566.001 Phishing: Spearphishing Attachment
T1059.001 Command and Scripting Interpreter: PowerShell
The sample is an RTF document containing an embedded OLE object that exploits the CVE-2017-11882 vulnerability in Microsoft Equation Editor. This exploit is designed to execute arbitrary code, likely downloading and running a secondary payload. The presence of the ".bin" file extracted from the OLE object data further supports this, indicating a dropped executable. The attack pattern is consistent with a phishing lure designed to trick users into opening the document and triggering the exploit.
Heuristics 5
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Equation Editor OLE1 native payload — CVE-2017-11882 related critical CVE_2017_11882_RELATEDRTF decodes to an OLE1 Equation.3 embedded object whose native data is large and payload-like, and \objupdate requests automatic activation. This is the delivery shape used by Equation Editor RCE documents such as CVE-2017-11882/CVE-2018-0802, but the malformed MTEF record needed for exact attribution was not recovered.
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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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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_off000018fe.bin1d0e4b150d7a7ffca54d2db6e1d598ffc51e0e159f4492c7bc746127c2062f4a |
rtf-objdata-decoded | RTF \objdata at offset 0x18FE | 100389 bytes |
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Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
Carved artifact entropy is 8.00, consistent with packed or encrypted content.
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