Win.Worm.Palevo-4445 RTF malware analysis — malicious · b8bf3b71520fff31

MALICIOUS

RTF

682.5 KB Authoring application: Msftedit 5.41.15.1507

MD5: c24576ce7a481a7c1a6c55c3bf0b5bde SHA-1: d32544eaf142785173d582ac54b97428564a939f SHA-256: b8bf3b71520fff31458b68cd7f23225158b7f7978587eae93ffa2409b01a4476

262 Risk Score

Malware Insights

Win.Worm.Palevo-4445 · confidence 95%

MITRE ATT&CK

T1559.001 Component Object Model Hijacking T1137.001 DLL Side-Loading T1059.003 Windows Command Shell

The RTF file contains an embedded OLE object which, upon extraction, reveals a PE executable. ClamAV signatures identify this as Win.Worm.Palevo-4445. The presence of RTF_OBJDATA, RTF_OBJEMB, RTF_OBJCLASS_PACKAGE, and RTF_MZ_HEX heuristics strongly indicates the embedding of a malicious executable within the RTF document. The document body text discusses administrative technology for electoral organisms, which appears to be a lure to disguise the malicious payload.

Heuristics 7

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.Worm.Palevo-4445 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Worm.Palevo-4445
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
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00000f5f.bin` `8d38529de99a62548f446ba3af4f0b3db9c420c690758060654ff0292a435e10`	rtf-objdata-decoded	RTF \objdata at offset 0xF5F	338785 bytes
Detection ClamAV: Win.Worm.Palevo-4445 Obfuscation or payload: likely Carved artifact entropy is 7.89, consistent with packed or encrypted content.
`embedded_rtf_00001050.exe` `287a5e9f05f55378f94535061b68c8de4839f682e4cb6dfb2f9bebaf2f082982`	embedded-pe	RTF hex-encoded MZ at offset 0x1050	338675 bytes
Detection ClamAV: Win.Worm.Palevo-4445 Obfuscation or payload: likely Carved artifact entropy is 7.89, consistent with packed or encrypted content.

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