Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 5f4024816ea65b79…

MALICIOUS

RTF / .DOC

31.3 KB First seen: 2023-02-23
MD5: b69580b8467fea7bb7be748589a87803 SHA-1: a275a81dd0cac2d9c4a44ea8bccc7c00ebee100a SHA-256: 5f4024816ea65b791ba0ee319fd1acf938f52d6793a75f90814710c0fa7aa3ea
80 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 RTF document contains OLE object data and an \objupdate directive, indicating it is designed to activate embedded objects. The document body provides a lure, instructing the user to 'Enable editing', a common tactic to bypass security measures and execute embedded malicious content. The presence of these elements strongly suggests the file is a dropper designed to execute a secondary payload.

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
  • 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_off00002d11.bin
3ccdcf291580822798a0cd2f28970baed5caf9fd8afabf1da942ce1a637df29d
rtf-objdata-decoded RTF \objdata at offset 0x2D11 1561 bytes