RTF / .DOC malware analysis — malicious · bf814662cf9fcbba

MALICIOUS

RTF / .DOC

1.90 MB Authoring application: Msftedit 5.41.15.1515

MD5: 7a0a44070df05129ee9eb78e48de0daf SHA-1: 85a9cd90f3f0f6f11791eb658a2a165058a18ce6 SHA-256: bf814662cf9fcbbafd0b34f8fa7216be8218557c9804745543b998a115a84a0d

302 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1027 Obfuscated Files or Information T1105 Ingress Tool Transfer

The RTF file contains a large OLE object with hex-encoded data that includes a PE header, strongly suggesting it's a dropper for a malicious executable. ClamAV signatures confirm this, identifying it as Win.Trojan.Agent-584229. The embedded artifact is likely the 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.Trojan.Agent-584229 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Agent-584229
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 ~1993KB 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_off000000d1.bin` `b44a98190215671480c34e491fab762b2dc51518751a1830150dbfae8c0ca260`	rtf-objdata-decoded	RTF \objdata at offset 0xD1	971632 bytes
Detection ClamAV: Win.Trojan.Agent-584229 Obfuscation or payload: likely Carved artifact entropy is 7.93, consistent with packed or encrypted content.

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