RTF / .DOC malware analysis — malicious · ae7115eba4476fd6

MALICIOUS

RTF / .DOC

312.0 KB

MD5: d691e9182497c97e6587dc0309a07a26 SHA-1: bea5b2e1a8c8a1a92e8ec3f6f131974b2bc7134f SHA-256: ae7115eba4476fd6ee40a39fa2d39eed04c54307726bb1fedbc81556c7b202ac

122 Risk Score

Malware Insights

MITRE ATT&CK

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

The RTF document contains an embedded OLE object with decoded Equation Editor payload and PE information, indicating a likely exploit. The \objupdate directive suggests that the OLE object is activated automatically upon opening the document. This points to an attack pattern involving the exploitation of the Equation Editor vulnerability to deliver a secondary payload.

Heuristics 4

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
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_off000014a4.bin` `e8af9ea30059efb0fbc405160ab125c694553ed326775c0d9b5fcb880f092428`	rtf-objdata-decoded	RTF \objdata at offset 0x14A4	156882 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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