Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 57b62ab85623ab57…

MALICIOUS

RTF / .DOC

18.3 KB First seen: 2022-08-26
MD5: f889b5433fea1045ea71ab06e0aa8501 SHA-1: 825cf876811507207f7221547917fdaa5829a483 SHA-256: 57b62ab85623ab57f3b8e5228b4222548b50ff8a523ba2d82baf72e1255835c2
120 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1566 Phishing T1566.001 Phishing: Spearphishing Attachment T1059.005 Command and Scripting Interpreter: Visual Basic

The RTF document contains OLE object data and an ".objupdate" directive, indicating an attempt to embed and activate an object. The "SE_ENABLE_LURE" heuristic confirms that the document instructs the user to enable editing, a common social engineering tactic to bypass macro security. This suggests the file is designed to deliver a malicious payload upon user interaction.

Heuristics 4

  • Ole10Native stream in RTF OLE object high CVE related RTF_OLE10NATIVE_STREAM
    RTF contains an embedded OLE object with an Ole10Native stream. This is a strong payload-container signal and is related to Word/OLE exploit delivery, but it is not specific enough on its own to assign a CVE.
  • \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_off000014ce.bin
e720150bc89e2d0fc4144b0b67a2423d54e0727fd0bb1672242c45a9e24137c8
rtf-objdata-decoded RTF \objdata at offset 0x14CE 4266 bytes