RTF / .DOC malware analysis — malicious · 54ca6ac69bd791ae

MALICIOUS

RTF / .DOC

307.6 KB

MD5: 9d1174ef3284c4cbaf6eacb0031e03b8 SHA-1: 5163f2555f455ce05fd2a97a2ef69cbfbee83328 SHA-256: 54ca6ac69bd791aea2f2791e57fb53549f89967435f79c627e26cf6315e7c905

122 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.003 Command and Scripting Interpreter: Windows Command Shell

The sample is an RTF document containing an embedded OLE object that leverages the Equation Editor vulnerability. The RTF_EQUATION_EDITOR and RTF_OBJUPDATE heuristics indicate that this object is designed to be activated, likely leading to the execution of malicious code. The extracted artifact 'objdata_00_off000006d0.bin' is the decoded content of this OLE object, which is the primary indicator of compromise. The document body is unreadable, but the heuristics strongly suggest a classic exploit delivery mechanism.

Heuristics 4

Split hex Equation Editor ProgID + OLE object critical RTF_EQUATION_EDITOR

RTF 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.
\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_off000006d0.bin` `e69c9f3859f9bcadf31a1008ee09bf82c83dd00f8a6811ef3ae428e7f766bf41`	rtf-objdata-decoded	RTF \objdata at offset 0x6D0	156381 bytes
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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