Malicious RTF — malware analysis report

Static analysis result for SHA-256 8bd284ac6b2f7ea7…

MALICIOUS

RTF

96.0 KB Created: 2018-07-13 12:57:00 First seen: 2021-02-23
MD5: 66cad424c693841c258a8db0f7469016 SHA-1: 30d58295315c15537475a31685bdf53f1e709740 SHA-256: 8bd284ac6b2f7ea77899033537695bd1e7ed36c991eaaf72c4f94b5eea371993
242 Risk Score

Heuristics 6

  • 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: Xls.Malware.Sload-7135989-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Malware.Sload-7135989-0
  • \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 2 \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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00003c40.bin rtf-objdata-decoded RTF \objdata at offset 0x3C40 24635 bytes
SHA-256: 5f0081617ef39983bb3c91817f5428033921f9f54af26de9d53c89b2e68976ea
Detection
ClamAV: Xls.Malware.Sload-7135989-0
Obfuscation or payload: unlikely
objdata_01_off00015486.bin rtf-objdata-decoded RTF \objdata at offset 0x15486 5519 bytes
SHA-256: a5498f6b323f835c2544cbdabb46eb6ce47c2ab7ff594b17483c50d62ca86557