Malicious RTF — malware analysis report

Static analysis result for SHA-256 538cbad9a5c25204…

MALICIOUS

RTF

261.0 KB Authoring application: Msftedit 5.41.15.1515 First seen: 2014-05-13
MD5: b58bf5bf688d6168901e57c471a59c44 SHA-1: 233fff534892f7e2345bd981908d90028452edb7 SHA-256: 538cbad9a5c25204d30acc2c9ffdd92a4658ece5d3460bf18c8f23ba65dd6343
140 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object, identified as a package object. Within this object, a PE executable header was detected in hex data. This strongly suggests the file is designed to deliver and execute a secondary payload, likely via exploitation of a client vulnerability.

Heuristics 4

  • 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
  • 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_off000000d3.bin rtf-objdata-decoded RTF \objdata at offset 0xD3 126333 bytes
SHA-256: b6d8eedc96ddceedf3f846e11cc0be4c152a4d990ebd6bf1d4148e8dbc1a098f

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