Malicious RTF — malware analysis report

Static analysis result for SHA-256 20b68c4d61c1682a…

MALICIOUS

RTF

9.5 KB First seen: 2019-05-31
MD5: 45860e1a6e4b107f68a7f72b1da7c557 SHA-1: 7fac364bce882c21114a8e85b458b696d8d85703 SHA-256: 20b68c4d61c1682a1df1cf4540de655363f1af5a96ce640e96363decaec74416
62 Risk Score

Malware Insights

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

The RTF file contains OLE object data and an \objupdate directive, indicating an attempt to exploit a vulnerability for client execution. The embedded OLE object, objdata_00_off00001661.bin, is the primary indicator of this exploit. No document body text or scripts were available for further analysis, limiting the ability to determine the specific payload or family.

Heuristics 3

  • \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 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_off00001661.bin rtf-objdata-decoded RTF \objdata at offset 0x1661 1583 bytes
SHA-256: 30151b8d1224d1df0f3b916cab884a70a9bbe32e2ea85d62ea44669818ec592a

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