Malicious RTF — malware analysis report

Static analysis result for SHA-256 91f0357118035131…

MALICIOUS

RTF

107.3 KB Created: 2020-01-16 14:02:00
MD5: 167660fbf9f0802417b560aa953a7291 SHA-1: f8f266f943c0dfe56ef3387917c1552f504bca21 SHA-256: 91f0357118035131b5777881502a28cde41aa6e526d74821e4579b43f785c60a
80 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The RTF file contains an embedded OLE object, indicated by the RTF_OBJDATA and RTF_OBJEMB heuristics. The RTF_OBJUPDATE heuristic suggests that the object is configured to automatically activate, which is a common technique for delivering malicious payloads. While the document body is minimal and the embedded URL is benign, the presence and configuration of the OLE object strongly suggest an attempt to exploit user interaction or automatic activation to execute arbitrary code. The specific nature of the payload within the OLE object could not be determined from the provided evidence.

Heuristics 4

  • \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.
  • 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000089bf.bin
8f7e01dcdab1e7a437befa2df92fb3451974ea9b59e916fa2fa0d746341aa694
rtf-objdata-decoded RTF \objdata at offset 0x89BF 15672 bytes