RTF / .DOC malware analysis — malicious · d07353ba2a6200da

MALICIOUS

RTF / .DOC

312.7 KB

MD5: 52c1979a59d49447ec63af923a999907 SHA-1: 8d6f0069f416726d5b02dbb06d271561683f38ba SHA-256: d07353ba2a6200dacc2759aac2bc71cd5bfa2ced963aa7659469c86677b46ad9

122 Risk Score

Malware Insights

MITRE ATT&CK

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

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 and a PE file, suggesting the primary purpose is to exploit this vulnerability. The `RTF_OBJUPDATE` heuristic further supports that the OLE object is designed to be activated, likely leading to the execution of the embedded malicious 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_off000018cf.bin` `4f50cd0fb1b79502af451b0973827b0fbf613125dc3e6cf826904cb473c2aac4`	rtf-objdata-decoded	RTF \objdata at offset 0x18CF	156735 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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