RTF malware analysis — malicious · dfba5870f97cb00e

MALICIOUS

RTF

2.98 MB

MD5: a58c637416c0fca2c1bb23dc5c099fc0 SHA-1: de629b0ee92e4c7a10f57a59de0f0c3e5c9ac312 SHA-256: dfba5870f97cb00e7a602fe18fbdd69d9eddbe789b1e7dcf85d9d744fa8e540c

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The RTF file contains multiple high-severity heuristic firings indicating the presence of embedded OLE objects with significant amounts of hex-encoded data, likely serving as a hidden payload. The \objupdate heuristic suggests that these objects are designed to be activated, leading to the execution of malicious code. Given the nature of RTF files and embedded objects, this is likely delivered as a spearphishing attachment.

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.
\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.
Large hex data blocks in OLE object high RTF_EXCESSIVE_HEX

RTF contains ~3124KB of hex-encoded data inside \objdata sections — may hide a payload
OLE object data medium RTF_OBJDATA

RTF contains 2 \objdata section(s) — embedded OLE objects
Embedded OLE object medium RTF_OBJEMB

RTF contains \objemb — embedded OLE object

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00001308.bin` `cbc92dfae27d630a53f9019d680bb03a128c8909a91861b9f723b17eb7214b89`	rtf-objdata-decoded	RTF \objdata at offset 0x1308	1041988 bytes

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