RTF / .DOC malware analysis — malicious · e0fd4bc3feb734d0

MALICIOUS

RTF / .DOC

785.1 KB

MD5: e95d171ea6f72d51f158093a74059724 SHA-1: cd723ad15c417faa862a0ad0427a076a75c82766 SHA-256: e0fd4bc3feb734d07eec859687c4d80fa46c28789599f77869d8b971397d52ef

162 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.001 PowerShell

The RTF file contains an embedded OLE object that decodes to a PE file, specifically targeting the Equation Editor vulnerability. This indicates an attempt to execute arbitrary code upon opening the document. The decoded object is likely a second-stage payload, though its specific function cannot be determined without further analysis.

Heuristics 5

Decoded Equation Editor payload + PE critical RTF_EQUATION_EDITOR

RTF decodes to an Equation Editor ProgID adjacent to OLE activation and the same decoded object stream contains embedded PE bytes. This matches the Equation Editor exploit surface used by CVE-2017-11882 / CVE-2018-0802 documents, while requiring payload evidence to avoid flagging benign Equation references.
Automatically linked OLE object high RTF_OBJAUTLINK

RTF contains \objautlink — an automatically linked OLE object surface that can be updated or activated when Word opens the document.
\objupdate forces OLE activation high RTF_OBJUPDATE

RTF contains \objupdate — forces automatic OLE object instantiation when the document is opened, bypassing user interaction. Almost exclusively seen in Equation Editor exploit documents.
OLE object data medium RTF_OBJDATA

RTF contains 1 \objdata section(s) — embedded OLE objects
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One 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_off00000053.bin` `df9c92bfa62986251f94eac31f937a0854c72d9ab624c53f620e6f52e72887d2`	rtf-objdata-decoded	RTF \objdata at offset 0x53	401825 bytes
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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