RTF / .DOC malware analysis — malicious · e70368551e411fb0

MALICIOUS

RTF / .DOC

518.1 KB

MD5: f5ec50bf3436325047f1cf3a27534778 SHA-1: 49397a24f621c94aa08afb7127594aa707c4b345 SHA-256: e70368551e411fb07744b41479872211fb950d012e67c6b8db188f0bcd1b1a73

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.003 Windows Command Shell

The RTF document contains embedded OLE objects, specifically triggering heuristics related to Equation Editor vulnerabilities. The presence of `RTF_EQUATION_EDITOR` and `RTF_OBJAUTLINK` strongly suggests an exploit targeting this component. The `RTF_OBJUPDATE` heuristic indicates that the embedded object is designed to be activated automatically, likely leading to the execution of a malicious payload. The extracted artifact `objdata_00_off0000102c.bin` is likely the exploit payload.

Heuristics 5

Equation Editor CLSID critical RTF_EQUATION_EDITOR

Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
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 2 \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_off0000102c.bin` `5485a3696262a045bf99b4c9bae7aabbfec2211d7979648e4c7c341e2a19f6ba`	rtf-objdata-decoded	RTF \objdata at offset 0x102C	175667 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.98, consistent with packed or encrypted content.

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