RTF malware analysis — malicious · 266b0ce3ca3745e5

MALICIOUS

RTF

2.62 MB Authoring application: Msftedit 5.41.15.1515

MD5: 57a26e86f96b9781fab06445ba626181 SHA-1: 64ecc2fa81c9b564d4fe74a7593603bd01678385 SHA-256: 266b0ce3ca3745e54084a06e2a7916b0f5c6a7a44d02244d5bbe3474c9a16982

302 Risk Score

Malware Insights

MITRE ATT&CK

T1559.001 Component Object Model T1105 Ingress Tool Transfer

The RTF document contains a large amount of hex-encoded data within an OLE object, which is flagged as suspicious. Critical heuristics indicate the presence of a PE header within this hex data, and ClamAV detections confirm a packed executable payload. The embedded artifact 'objdata_00_off0000e9ea.bin' is the likely payload.

Heuristics 8

PE header (with DOS stub) in hex data critical RTF_MZ_HEX

Hex-encoded PE (MZ + DOS stub) found inside RTF — likely an embedded executable payload
ClamAV: Win.Packed.Unsafe-6943780-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Packed.Unsafe-6943780-0
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
Package object class high RTF_OBJCLASS_PACKAGE

OLE Package object — can wrap arbitrary files
Large hex data blocks in OLE object high RTF_EXCESSIVE_HEX

RTF contains ~2734KB of hex-encoded data inside \objdata sections — may hide a payload
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
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off0000e9ea.bin` `cf64eb7930544b4376f9001d75037a0e10055eb1a5b4639b66dddf7e3f2c52b2`	rtf-objdata-decoded	RTF \objdata at offset 0xE9EA	1303927 bytes
Detection ClamAV: Win.Packed.Unsafe-6943780-0 Obfuscation or payload: likely Carved artifact entropy is 7.76, consistent with packed or encrypted content.

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