RTF / .DOC malware analysis — malicious · 74ee8c356612daf5

MALICIOUS

RTF / .DOC

379.6 KB

MD5: e13228a610dcfa506511c5168a34da90 SHA-1: b09e1c9bf9f90144df5746086a1ce4e8e7f48a50 SHA-256: 74ee8c356612daf5dcf0a9b25db33487176120af005d072f40ec4fa11ad26e89

162 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF file contains an embedded OLE object with an Equation Editor CLSID, and uses \objupdate to force activation. This strongly indicates exploitation of a known vulnerability in the Equation Editor component. The high entropy of the extracted objdata artifact suggests it is likely a packed or encrypted payload, intended to be executed after the initial exploit.

Heuristics 5

Ole10Native stream in RTF OLE object high CVE related RTF_OLE10NATIVE_STREAM

RTF contains an embedded OLE object with an Ole10Native stream. This is a strong payload-container signal and is related to Word/OLE exploit delivery, but it is not specific enough on its own to assign a CVE.
Equation Editor CLSID critical RTF_EQUATION_EDITOR

Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
\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_off00001145.bin` `b891e67e24acb76b683b9f193fe10095852cb89a1cc6e579e8b5e130841fc36a`	rtf-objdata-decoded	RTF \objdata at offset 0x1145	64070 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.93, consistent with packed or encrypted content.

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