Malicious RTF — malware analysis report

Static analysis result for SHA-256 6729cc1ad6025bbb…

MALICIOUS

RTF

1.76 MB Created: 2019-09-17 13:59:00 First seen: 2020-12-25
MD5: 4da65d116c36d76c84815413436d745d SHA-1: 46411cc293805334ae0cf4fa53fa8295eccd9c3c SHA-256: 6729cc1ad6025bbbe76b18f04af1c0bca5705ca4a25f1769943585de72d039f9
122 Risk Score

Malware Insights

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

The RTF file contains embedded OLE objects and uses an objupdate directive, indicating an attempt to execute embedded content. The presence of a 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document is designed to trick the user into providing a password for an archive, likely to bypass security controls. No scripts were extracted, and the document body was heavily truncated, limiting further analysis of the specific payload.

Heuristics 5

  • \objupdate forces OLE activation high RTF_OBJUPDATE
    RTF contains \objupdate — forces automatic OLE object instantiation when the document is opened, bypassing user interaction. Almost exclusively seen in Equation Editor exploit documents.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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
  • 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off001b9dfd.bin rtf-objdata-decoded RTF \objdata at offset 0x1B9DFD 1435 bytes
SHA-256: b3902ac8e64a5a7bf98a1bccfcf03e3e6a3ad9d9e62edb6b676b2fca08fd02bf

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