RTF / .DOC malware analysis — malicious · 4dc63e828542176c

MALICIOUS

RTF / .DOC

198.6 KB

MD5: 6a74df140aec73313e8288248ee801be SHA-1: 7bbc0511137f7978508bf18a29ebe8f770ba109b SHA-256: 4dc63e828542176cd96971753a729ce49e3ed38c79c0b9f9e56778d012b9dc3d

122 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The file is an RTF document that contains an embedded OLE object. Heuristics indicate that this object is a decoded Equation Editor payload which likely exploits a known vulnerability to execute arbitrary code. The embedded object, objdata_00_off000010c6.bin, is highly suspicious and likely contains the initial stage of the attack. The attack pattern suggests a malicious document designed to exploit a vulnerability upon opening, leading to further payload execution.

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_off000010c6.bin` `22f567ea7b7ec9e907fc3126b8a43ceab858a1031b6bf28dd1db6ac8b07c3c56`	rtf-objdata-decoded	RTF \objdata at offset 0x10C6	83442 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.95, consistent with packed or encrypted content.

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