Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 eaf823ff4d6112a7…

MALICIOUS

RTF / .DOC

699.4 KB
MD5: 62d84deb859c9e770ed6ad64a236c9a2 SHA-1: 91b2c36414f3f9229a6b40066ed6d0a3d389d1df SHA-256: eaf823ff4d6112a7be24f15d8a3f0fda2512bfae97bc28e3713c7831e8bf5d8a
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 heuristics indicating that \objupdate forces OLE activation. The document body presents a lure related to financial audits, instructing the user to 'Enable editing from the yellow bar above', a common technique to bypass macro security. This suggests the document is designed to trick the user into executing embedded malicious content, likely a macro, to download and run a second-stage 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_off00008e46.bin
dff7d534e8ccead0f137974104211c81e502f0891ba2d6c76fe8b2d6838d53d9
rtf-objdata-decoded RTF \objdata at offset 0x8E46 4230 bytes