Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 3345cc70587d62b8…

MALICIOUS

RTF / .DOC

8.8 KB First seen: 2022-08-31
MD5: c45a9c63a4961939e5c6372d95e2ced0 SHA-1: 095c8654419b6160c91003a238152854be62766e SHA-256: 3345cc70587d62b8e1af33cf3547f7960edf18df26bc49ee55b45f56a1c4cd1a
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 RTF document contains OLE object data and an \objupdate directive, indicating it's designed to activate embedded objects. The document body explicitly instructs the user to 'enable editing to view in readable format', a common lure to bypass macro security. This suggests the file is a dropper intended to download and execute a second-stage 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_off00001183.bin
463c4da618f5749e1057f80caed76e729b3ca8887ecb6762041ad603a639c0c5
rtf-objdata-decoded RTF \objdata at offset 0x1183 1570 bytes