RTF / .DOC malware analysis — malicious · 3c0caa8f5e9e9ff5

MALICIOUS

RTF / .DOC

164.1 KB

MD5: 9c4e1890a71c374da62602346418c3da SHA-1: c63810a283e5ffe4168f7dffeceb59dd6944f75f SHA-256: 3c0caa8f5e9e9ff564ea26c6d53e2628c163cfe954923434e37d61908a105d2e

162 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.001 Malicious Link T1204.002 Malicious File

The RTF file contains an OLE object that is automatically linked and updated, indicating an attempt to exploit vulnerabilities. Specifically, the presence of the Equation Editor CLSID points to a known exploit targeting this component. The embedded OLE object data, when decoded, likely contains the malicious payload or instructions for its download and execution. The attack pattern is consistent with exploiting the Equation Editor vulnerability to achieve arbitrary code execution.

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 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_off000018d9.bin` `fce02a9de091b3281e3564a8b579400b95ffd7bc8fadbb6daaa2cee1d3c981af`	rtf-objdata-decoded	RTF \objdata at offset 0x18D9	64575 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.92, consistent with packed or encrypted content.

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