Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 e8d2e0e756b4777c…

MALICIOUS

RTF / .DOC

1.95 MB
MD5: e07e2a03cebef899c5f9ad1e17e1a93c SHA-1: af7cc5b4a50095809dfa2eb7b132c53c6d4277c6 SHA-256: e8d2e0e756b4777c3055ad694a9f0424b92f7a07610e347061b76feeb4ecc524
100 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1566 Phishing T1566.001 Phishing: Spearphishing Attachment T1059 Command and Scripting Interpreter T1059.005 Command and Scripting Interpreter: Visual Basic

The file is an RTF document containing embedded OLE objects, with a specific heuristic firing for \objupdate, indicating an attempt to force OLE activation. The document body presents a lure related to financial auditing to encourage users to enable editing and macros. This suggests the document is designed to bypass security measures and likely download and execute a secondary payload.

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
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00127f55.bin
0bfdd8f9483b2384fb043a1ec8521c622fd3694747ff1d0fa0827d157a65e3cd		 rtf-objdata-decoded RTF \objdata at offset 0x127F55 4274 bytes

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