RTF / .DOC malware analysis — malicious · 4d3a480e606eaaef

MALICIOUS

RTF / .DOC

929.1 KB

MD5: fb60ba08db33c6869854427b9d822fa8 SHA-1: fa9bf7b4ac2a17dfe75c2ff6cc9340b1d7c95b65 SHA-256: 4d3a480e606eaaef9e2bf1e74bc6815d1184c74d1f40d373ab243edb3f356aa6

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.003 Windows Command Shell T1105 Ingress Tool Transfer

The file is an RTF document containing an embedded OLE object that decodes to a PE file, indicative of an exploit targeting the Equation Editor vulnerability. The presence of `RTF_EQUATION_EDITOR` and `RTF_OBJEMB` heuristics strongly suggests this attack vector. The decoded object, `objdata_00_off000005f0.bin`, is likely the second-stage payload, which is expected to be downloaded and executed.

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_off000005f0.bin` `151576b5887ef514f08ced346029a70d06ea82720ba42868111bd83159ae1ab6`	rtf-objdata-decoded	RTF \objdata at offset 0x5F0	474823 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.