Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 4ac2dfe8f17081f7…

MALICIOUS

RTF / .DOC

9.3 KB First seen: 2022-08-02
MD5: a5446dd3cfb0c693dcb157246ac051f3 SHA-1: 5571580414e332221028f478972533c28bc578c5 SHA-256: 4ac2dfe8f17081f710891a4ea528ce0403708ce728ea73a2347e765f4b0be5ea
80 Risk Score

Malware Insights

MITRE ATT&CK
T1204 User Execution T1204.002 Malicious File T1566 Phishing T1566.001 Spearphishing Attachment T1059 Command and Scripting Interpreter

The sample is an RTF document containing OLE object data and an \objupdate directive, indicating an attempt to embed and activate external content. The heuristic 'SE_ENABLE_LURE' confirms that the document instructs the user to enable editing, a typical social engineering tactic to bypass security measures and execute embedded malicious code. No specific malware family could be identified.

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 2 \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_off00000fce.bin
45e679a7ea104a806430eed7241e32af92de0070293200eb02a193ba7da4a038
rtf-objdata-decoded RTF \objdata at offset 0xFCE 1639 bytes