RTF malware analysis — malicious · d91cedd3deff24d0

MALICIOUS

RTF

1008.8 KB Authoring application: Msftedit 5.41.15.1515

MD5: a55f5cea39890f11755c9cf3c543c3f0 SHA-1: 2e9dbab28ab2c0b7fec4dc3f3ac1bcf75cc5841b SHA-256: d91cedd3deff24d02222ae80210bebb79272780e055cb9c4fb2686a9321e20aa

302 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The RTF document contains a large OLE object with embedded hex data, which includes a PE header. ClamAV detected this as Win.Trojan.Prorat-11. The document body instructs the user to click an image and translate a name, a common social engineering tactic to prompt further interaction that could lead to payload execution. The presence of the embedded PE header strongly suggests the OLE object is a dropped executable.

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.Prorat-11 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Prorat-11
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 ~1032KB 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_off00000102.bin` `3d4631e10e27e9dff322e5ad726efc102c622eb17c9b15b0df8a7fdf301d10ff`	rtf-objdata-decoded	RTF \objdata at offset 0x102	465221 bytes
Detection ClamAV: Win.Trojan.Prorat-11 Obfuscation or payload: likely Carved artifact entropy is 7.41, consistent with packed or encrypted content.

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