Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 2a55b4ff2adde926…

MALICIOUS

RTF / .DOC

733.0 KB
MD5: 4420c9bdad8d729bca13d9eb67c58f80 SHA-1: 08773be2c297fcb035a3b4ae94647223196c5144 SHA-256: 2a55b4ff2adde92625696474494fc48cabe46b770703486779587454e0a10d4f
80 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 RTF document contains OLE object data and an ".objupdate" directive, indicating it is designed to activate embedded objects, a common technique for malware delivery. The document body provides a lengthy, fabricated explanation of financial auditing to trick the user into enabling editing and macros, as suggested by the SE_ENABLE_LURE heuristic. This suggests the file is a downloader or dropper for 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 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_off0000c664.bin
4a93bb914c89dbc8bbf28bda2570514d678dae23ce070cccc9f08151028d52ef
rtf-objdata-decoded RTF \objdata at offset 0xC664 4237 bytes