Webdor — RTF / .WRI malware analysis

Static analysis result for SHA-256 e44059d23038ff44…

MALICIOUS

RTF / .WRI

304.4 KB Authoring application: Msftedit 5.41.15.1515
MD5: a348fbd2f563cec1ad81b03cabea49f7 SHA-1: 207ee3d7c0da0592225960216ab10d59c5be5cff SHA-256: e44059d23038ff448083ef294bb640a84e9e92d57c665f94c6fd9622938ec910
260 Risk Score

Malware Insights

Webdor · confidence 95%

MITRE ATT&CK
T1559.001 Component Object Model Hijacking T1204.002 Malicious File

The RTF file contains embedded OLE object data, specifically a package object, which is a common technique for delivering malicious payloads. ClamAV identified the file as Win.Trojan.Webdor-9854571-0, indicating a known trojan family. The document body is formatted as a curriculum vitae, serving as a social engineering lure to encourage user interaction with the embedded object, likely leading to the execution of the trojan.

Heuristics 6

  • 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.Webdor-9854571-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Webdor-9854571-0
  • 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
  • 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000003af.bin
fe38a2a43d474ecd1c6441f5113e1bdabd73afb03572d2c186fb021c9fc3a25c
rtf-objdata-decoded RTF \objdata at offset 0x3AF 147720 bytes
Detection
ClamAV: Win.Trojan.Webdor-9854571-0
Obfuscation or payload: unlikely