RTF / .DOC malware analysis — malicious · ff3dcba104dcf8f4

MALICIOUS

RTF / .DOC

379.8 KB

MD5: 98943d1001e9ba84a949105dd6bab620 SHA-1: 578ed9b455b09854c8e0289a51f396e6be7ea362 SHA-256: ff3dcba104dcf8f44636e5947a3e9be8b2b268115b1fb627ae7f6171508acf29

162 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The RTF file contains an embedded OLE object, specifically targeting the Equation Editor vulnerability (RTF_EQUATION_EDITOR). This indicates an attempt to exploit a known weakness for initial access. The presence of OLE object data and auto-linking suggests the file is designed to execute embedded code or trigger an update mechanism, likely leading to the download and execution of a secondary payload. No specific family could be identified, but the exploit vector is clear.

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_off0000136c.bin` `16a8864525d4c8fab720c601b84fc44b4b2f963b35d1df67d6f49b996c6c8d15`	rtf-objdata-decoded	RTF \objdata at offset 0x136C	64059 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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