Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 3fdade24ae029dbe…

MALICIOUS

RTF / .DOC

7.2 KB First seen: 2022-09-06
MD5: 42a488f7ba39769a40f9fcb4a6eca20b SHA-1: c123611ba4b66f01a04b195240fb750b55f2ab34 SHA-256: 3fdade24ae029dbe7098818024204c1736ad4c7a1345782e42e8aaa4a494b839
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 RTF document contains OLE object data and uses an \objupdate directive, indicating an attempt to activate embedded objects. The document body explicitly instructs the user to "Enable editing" via a yellow bar, a common lure to bypass security settings and enable malicious content. This suggests the file is designed to exploit user interaction to download and 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 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_off00000c64.bin
fc5a2bd2ee9703d274802279ea2688d62fd4c25536c8f0c0aecb74aed373ff3a
rtf-objdata-decoded RTF \objdata at offset 0xC64 1452 bytes