Malicious RTF — malware analysis report

Static analysis result for SHA-256 74c154a5576eefa0…

MALICIOUS

RTF

1.26 MB Created: 2015-06-27 12:10:00 First seen: 2015-10-06
MD5: 74210340934e1aea62c11853992ef600 SHA-1: 7b41bca018f7064b780a1b6b780ac0afaeaf8ed5 SHA-256: 74c154a5576eefa0da45a32bccf4cee8dfd6fb499df4150cad5daa1b21b41bbe
244 Risk Score

Heuristics 8

  • ClamAV: Rtf.Dropper.Agent-9965975-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Rtf.Dropper.Agent-9965975-1
  • 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
  • Large hex data blocks in OLE object high RTF_EXCESSIVE_HEX
    RTF contains ~1266KB 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.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://schemas.microsoft.com/office/word/2003/wordml In RTF body
    • http://schemas.microsoft.com/SMI/2005/WindowsSettingsIn RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00002b87.bin rtf-objdata-decoded RTF \objdata at offset 0x2B87 628491 bytes
SHA-256: 6c442cd4a5f39a0b2ef8d4f7c49ad2ddc627f0e84d7df83b731270103fea67ad
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.68, consistent with packed or encrypted content.