Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 82d32071833bc82e…

MALICIOUS

RTF / .DOC

377.5 KB First seen: 2024-05-28
MD5: 7f470188e082999af3100698c29698d4 SHA-1: aaf49a597af6de072bb5c12c589807396409d699 SHA-256: 82d32071833bc82e3d60a9904678a1ae49745d4f3cdda64e6d45355ae17bd59f
80 Risk Score

Malware Insights

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

The sample is an RTF document containing OLE object data and an instruction to enable editing, indicative of a macro-based lure. The document body discusses financial audits to appear legitimate, a common social engineering tactic to trick users into enabling malicious content. The presence of ".objdata" and ".objupdate" sections strongly suggests the embedded OLE object is intended to be activated, likely 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 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_off00015a2d.bin
ca802c5958310044941f7bce7cf178eb9a8ba8c5227785083a0a4eb11a6a669b
rtf-objdata-decoded RTF \objdata at offset 0x15A2D 1658 bytes