Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 79a9604f8aa3c63e…

MALICIOUS

RTF / .DOC

63.9 KB
MD5: 59da137fce869fba5e1492b0a18a4112 SHA-1: 55d58698aec2157367a54741d2d4bb1772249754 SHA-256: 79a9604f8aa3c63e95628d4a7da96f36a91c03691be66964b9a619b45ee630eb
60 Risk Score

Malware Insights

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

The RTF document contains an embedded OLE object, indicated by the RTF_OBJDATA heuristic. The RTF_OBJUPDATE heuristic suggests that this object is designed to be activated automatically, which is a common technique for exploiting vulnerabilities in Microsoft Office applications. The presence of an OLE object and the activation trigger strongly suggest an attempt to exploit a client-side vulnerability, likely for the purpose of executing a secondary payload. No specific malware family could be identified.

Heuristics 2

  • \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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00001e85.bin
1d65b02b3c116add4981048f2b4209acb79c3c0cbfcfe1446d2fdcbaf86b4644
rtf-objdata-decoded RTF \objdata at offset 0x1E85 2226 bytes