Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 439d472d137fbef3…

MALICIOUS

RTF / .DOC

188.2 KB First seen: 2022-10-25
MD5: 83e5178d4c99e007771c9ba87acf5e64 SHA-1: 30666dfb9b33245d68e99504ffa065e02b160c0d SHA-256: 439d472d137fbef33551fb5220fbac0c88fe462c526f4d0596d09de80aefb679
80 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1566 Phishing T1566.001 Phishing: Spearphishing Attachment T1566.002 Phishing: Spearphishing via Service

The document uses a common lure to trick users into enabling editing and macros, indicating a likely attempt to deliver a malicious payload. The presence of OLE object data and the ".objupdate" directive further suggest the embedding of malicious content designed to execute upon activation. 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 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_off000011a7.bin
a777330973e9e74872f8bd241233466833134c1c549127dc759fa86ecdbf567e
rtf-objdata-decoded RTF \objdata at offset 0x11A7 1503 bytes