Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 74ba08527eb2031e…

MALICIOUS

RTF / .DOC

1.53 MB
MD5: d3a6ee875f48700515d0db07e09f8e1b SHA-1: a983be6589b141fcac5f761f72c50df878f0262c SHA-256: 74ba08527eb2031ed3f67dcc33e51663d8af743025cc31b09b1d2a49bdca1441
242 Risk Score

Malware Insights

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

The RTF file contains multiple indicators of exploitation targeting Microsoft Equation Editor, including specific CLSID and OLE object data. The presence of a large amount of hex-encoded data within OLE objects suggests a hidden payload. The embedded URL, despite being labeled as confirmed benign, is included as a potential indicator.

Heuristics 7

  • 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.
  • Ole10Native stream in RTF OLE object high CVE related RTF_OLE10NATIVE_STREAM
    RTF contains an embedded OLE object with an Ole10Native stream. This is a strong payload-container signal and is related to Word/OLE exploit delivery, but it is not specific enough on its own to assign a CVE.
  • Equation Editor CLSID critical RTF_EQUATION_EDITOR
    Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
  • \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.
  • Large hex data blocks in OLE object high RTF_EXCESSIVE_HEX
    RTF contains ~1603KB of hex-encoded data inside \objdata sections — may hide a payload
  • OLE object data medium RTF_OBJDATA
    RTF contains 2 \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 https://bit.ly/3z4ONUN

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00000762.bin
761beb4c61528c6d04938cd23cc8a1cdf814ec492f3a3ab664773efe7616562f		 rtf-objdata-decoded RTF \objdata at offset 0x762 801872 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.