RTF malware analysis — malicious · ba09d0f8b0d54ea1

MALICIOUS

RTF

25.2 KB First seen: 2023-05-02

MD5: dfe1daa92531bdf7c7f6665de38bcbd6 SHA-1: 9b104a913f2c0d01e3f6650491bd9dcd9cd928a7 SHA-256: ba09d0f8b0d54ea16810d59918556d37ffa61ef3eafd234a54444a59ebf37ba8

80 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.001 PowerShell

The sample is an RTF file containing embedded OLE objects, indicated by RTF_OBJDATA and RTF_OBJEMB heuristics. The RTF_OBJUPDATE heuristic suggests that these objects are designed to be activated automatically upon opening, which is a common technique for exploiting vulnerabilities or delivering malicious payloads. The document body is heavily obfuscated and does not provide clear textual lures. No scripts were extracted from this sample. Given the OLE object exploitation, the likely attack pattern is a spearphishing attachment designed to trigger malicious code execution.

Heuristics 3

\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

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00001c52.bin` `9fe92eaadb451a78036d6c2a2faabf097bdeeb380285ccc2ad55accac0feb15f`	rtf-objdata-decoded	RTF \objdata at offset 0x1C52	3661 bytes

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