RTF / .DOC malware analysis — malicious · 971759ead91648e6

MALICIOUS

RTF / .DOC

932.9 KB

MD5: 04a31614656cec6a6a16688f9791ed65 SHA-1: 22170c6f14a69708316f45b13de448401fff916a SHA-256: 971759ead91648e60c57d5d91340a27885c4faf2777df8e9fca23b52aee97203

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Phishing: Spearphishing Attachment T1204.002 Malicious File: Malicious Attachment

The RTF file contains an embedded OLE object that leverages the Equation Editor vulnerability. The `RTF_EQUATION_EDITOR` heuristic indicates a decoded Equation Editor payload with a PE file, strongly suggesting exploitation. The `RTF_OBJDATA` and `RTF_OBJEMB` heuristics confirm the presence and embedding of OLE objects, while `RTF_OBJUPDATE` points to the mechanism for activation. No document body or script content was available for further analysis, but the core attack pattern is clear.

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.
\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
Embedded OLE object medium RTF_OBJEMB

RTF contains \objemb — embedded OLE object
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_off0000143a.bin` `340c2623b7a775f23db3a2bad8f1459336b42d6eb310f5bc101dae8df896a3ba`	rtf-objdata-decoded	RTF \objdata at offset 0x143A	474965 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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