RTF / .DOC malware analysis — malicious · cec15457b335a279

MALICIOUS

RTF / .DOC

906.7 KB

MD5: e3f78562a7ec930b5e517fff7796a9e7 SHA-1: 13d2f01b41398fb75dfc5d814d8a4f80130b70db SHA-256: cec15457b335a2793e571d7695195bfd800f42a36ea99079b2adffb8535a5838

122 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The RTF file contains an embedded OLE object that decodes to a PE file, indicating a malicious payload. The critical RTF_EQUATION_EDITOR heuristic confirms the use of the Equation Editor vulnerability for exploitation. The objupdate heuristic suggests that the OLE object is designed to be activated automatically, leading to the execution of the embedded payload. The presence of a PE file within the RTF suggests the file is a downloader or dropper.

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_off00000044.bin` `786817b77d50f5d69d14c6fde27a0d21e1a96d504a6e384b739326c348a8e954`	rtf-objdata-decoded	RTF \objdata at offset 0x44	464086 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 8.00, consistent with packed or encrypted content.

Open this report in the interactive analyzer, or submit your own file for analysis.