Malicious RTF — malware analysis report

Static analysis result for SHA-256 c94eb3762ede86bb…

MALICIOUS

RTF

900.1 KB Created: 2019-09-17 13:59:00 First seen: 2020-02-04
MD5: 86e26f17828fbd59f53c98cbec666be0 SHA-1: 9a2e788463d0ca0ed663098987c7c8b569c3909f SHA-256: c94eb3762ede86bba5b1d9c6b07978b3a21fe50fe3b44c6b151d4a0673183b8f
82 Risk Score

Malware Insights

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

The RTF file contains embedded OLE objects and uses \objupdate to force their activation, indicating an attempt to exploit a client execution vulnerability. The presence of these indicators suggests the file is designed to deliver a malicious payload when opened. No specific family could be identified from the available 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 In RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000a31f0.bin rtf-objdata-decoded RTF \objdata at offset 0xA31F0 33573 bytes
SHA-256: 96979bcbdd043cb424362b393673f901cbdca064dceb42aaab29cefa073896b4

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