MALICIOUS
120
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
T1566.001 Spearphishing Attachment
The sample is an RTF document that contains embedded OLE object data. Critical heuristic firings indicate the presence of the CVE-2017-11882 Equation Editor vulnerability, which is commonly exploited to achieve arbitrary code execution. The ".objupdate" heuristic further suggests that the embedded OLE object is configured to activate automatically, likely to trigger the exploit. The document body is heavily obfuscated and unreadable, providing no direct clues to the payload's intent, but the exploit itself strongly suggests a malicious downloader or dropper.
Heuristics 3
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CVE-2017-11882 — Equation Editor FONT record overflow critical CVE likely CVE_2017_11882Equation Editor MTEF contains an overlong FONT typeface field, the vulnerable copy primitive for CVE-2017-11882. This is stronger evidence than the Equation Editor CLSID alone because it identifies the malformed record that drives code execution in EQNEDT32.EXE.
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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_off00001024.bin7e4420242ae0b09e5521b7074e55987ebc88a4d44cd6bb43c2dfe0e13ea29a7f |
rtf-objdata-decoded | RTF \objdata at offset 0x1024 | 4155 bytes |
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