RTF malware analysis — malicious · e35109a09ab67309

MALICIOUS

RTF

180.3 KB First seen: 2024-07-04

MD5: 2065f134f20986527b4023d59e12081c SHA-1: 3a103cafe7d928c66d00bd07830a864f549dccd4 SHA-256: e35109a09ab67309cdd6455d92bca6f2b67a11791cfc1df8008289f0b2a8963f

100 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The sample is an RTF file exhibiting high-confidence heuristics for OLE object activation and embedded data. The RTF_OBJUPDATE heuristic indicates that the document forces OLE activation, which is a common technique for executing embedded malicious content. The presence of OLE object data and the Ole10Native stream further support this. The document body is heavily obfuscated and does not provide clear textual lures, but the technical indicators strongly suggest a malicious payload is being delivered via OLE object exploitation.

Heuristics 3

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.
\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

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00001d68.bin` `314cd1007fa1424f36ee14983df153993d2c6e4ad5078f431570f45ee69fda7a`	rtf-objdata-decoded	RTF \objdata at offset 0x1D68	4182 bytes

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