RTF malware analysis — malicious · 8b04035e8d47c75e

MALICIOUS

RTF

449.5 KB Created: 2021-07-30 23:08:00

MD5: 7c15c7e064cbb7cfe62c882e85c0bc7a SHA-1: 59d9563c2d9529ce24aededff61b1ae891212b19 SHA-256: 8b04035e8d47c75ea91f210bd7b56633645dde02b7221ba38c5392d514b9ea99

190 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious File

The RTF file contains OLE object data and an automatic link that forces OLE activation. This suggests the file is designed to exploit OLE vulnerabilities to execute embedded content, likely leading to the download or execution of a secondary payload. The extracted artifact 'objdata_00_off000078f1.bin' is a key indicator of this malicious behavior.

Heuristics 5

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 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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://schemas.microsoft.com/office/word/2003/wordml

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off000078f1.bin` `85ac6f9c2f6f062cd79faa68cc2961ce24fdc6d1ceee91c5b7de069581e0cf69`	rtf-objdata-decoded	RTF \objdata at offset 0x78F1	75567 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.79, consistent with packed or encrypted content.

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