RTF malware analysis — malicious · 62388649d426894e

MALICIOUS

RTF

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

MD5: 176ff371319b91555be2c8bcfcec2770 SHA-1: 65bd7acb79f2de81db72b4ba5ebc7f0b4237ddca SHA-256: 62388649d426894ea45953dd31c122f92167290674f21072cfdc2c862e1abb00

144 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The RTF document contains OLE object data and triggers heuristics related to OLE activation and password-protected archive lures. This suggests the document is designed to trick the user into believing they need to open a password-protected archive, likely to bypass security controls. The embedded OLE object data is a suspicious artifact that warrants further investigation.

Heuristics 6

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.
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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` `d657159267d6abf00f44de02c7555004383ff8902d2ecf4da42f757e1c4e003a`	rtf-objdata-decoded	RTF \objdata at offset 0x78F1	75359 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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