Malicious RTF — malware analysis report

Static analysis result for SHA-256 99fb01a1a01506a0…

MALICIOUS

RTF

873.4 KB Created: 2015-07-06 15:29:00 First seen: 2015-10-06
MD5: bb1edbcf629381d9cd8d749ffcaa2c20 SHA-1: 31fb34833b10c67e677aece3c3b04325ac9d3815 SHA-256: 99fb01a1a01506a00e59872393f010b5e68042afbc3df9f67d190fabdc4ebb4a
244 Risk Score

Heuristics 8

  • Composite Moniker in RTF OLE object high CVE related RTF_COMPOSITE_MONIKER_RELATED
    RTF contains Composite Moniker CLSID in OLE object context, but no nearby scriptlet/SCT payload was confirmed. Treat as related moniker attack-surface evidence rather than proof of CVE-2017-8570 exploitation.
  • 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
  • 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_off0000321a.bin rtf-objdata-decoded RTF \objdata at offset 0x321A 417738 bytes
SHA-256: 2fd821343ce504a133106ba570cce88d48021beb3e15c7855f167ffd17e4104e
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.48, consistent with packed or encrypted content.