Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 2627ba9dbf84c02f…

MALICIOUS

RTF / .DOC

99.8 KB Authoring application: Msftedit 5.41.15.1515
MD5: 69219b720cec4772f297b7242c5551d8 SHA-1: 3ade99bc45446b967bf569b7f7aeb5142deedc11 SHA-256: 2627ba9dbf84c02f810a3811c6b41ee20422dffe9c9f2cb26b525e1ccfb4870b
260 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1105 Ingress Tool Transfer

The RTF file contains embedded OLE objects, including a PE executable identified by ClamAV as Win.Trojan.Dropper-11394. This indicates the file is designed to drop and execute a secondary payload. The document body text, while seemingly innocuous, is likely a lure to entice the user to open the malicious attachment.

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.Dropper-11394 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Dropper-11394
  • 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_off000000c3.bin
6ec89ea0602444cdc5602bd361d9570853ab8c63d77c6fb8804a6680080b47ff
rtf-objdata-decoded RTF \objdata at offset 0xC3 45892 bytes
Detection
ClamAV: Win.Trojan.Dropper-11394
Obfuscation or payload: unlikely