RTF malware analysis — malicious · 7cd928cd0fcf0f9d

MALICIOUS

RTF

37.6 KB Authoring application: Msftedit 5.41.21.2510 First seen: 2021-06-13

MD5: 05104f32f4e88bbb62c1370defe37b54 SHA-1: 827d87fe1301217f6e93739776ad0ca083456098 SHA-256: 7cd928cd0fcf0f9df4748d39483595dbfcc4981b09341d6aae778006e3ed3ef4

102 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF document contains OLE objects that are automatically linked and updated, indicating an attempt to execute embedded content. The heuristics strongly suggest the exploitation of OLE object activation to achieve code execution. While no specific family is identified, the technique points towards a malicious document designed to deliver a secondary payload.

Heuristics 4

Automatically linked OLE object high RTF_OBJAUTLINK

RTF contains \objautlink — an automatically linked OLE object surface that can be updated or activated when Word opens the document.
\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 2 \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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off000000f3.bin`	rtf-objdata-decoded	RTF \objdata at offset 0xF3	10000 bytes
SHA-256: `04f655e40854d12b04a0446ff5dd58b2f76f076283a50d2b4740007c460b2a4f`
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.98, consistent with packed or encrypted content.
`objdata_01_off00004f21.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x4F21	6502 bytes
SHA-256: `15ca56051c8c76976d63ad07f6d091426d638bf67d642f3731be78ea689819cd`

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