Malicious Office (OLE) / .DOC — malware analysis report

Static analysis result for SHA-256 ae5078156e07afd8…

MALICIOUS

Office (OLE) / .DOC

76.0 KB Created: 2000-06-19 00:58:00 Authoring application: Microsoft Word 8.0
MD5: 27d04956764a0e5a752cb9209d81ce06 SHA-1: 2d1cdb6eabfd790045b9e7a6a3bdb5e582eaac09 SHA-256: ae5078156e07afd85443e63dfbd0db2881c492cbe4c8d3270fd0944aede7d85f
260 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1566.001 Spearphishing Attachment

The file is a malicious Microsoft Word document containing VBA macros, specifically an Auto_Close macro that is executed automatically. The presence of a CreateObject call and VBA p-code auto-execution indicates the macro is designed to perform malicious actions. ClamAV detections confirm this, identifying it as 'Doc.Trojan.Linda-3'. The document body suggests it's an attachment with administrative instructions, a common lure for macro-based malware.

Heuristics 6

  • ClamAV: Doc.Trojan.Linda-3 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Linda-3
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • Auto_Close macro high OLE_VBA_AUTOCLOSE
    Auto_Close macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
a15eaf32e2a70906c40f3b6c4061b5c250db04ab096be4717431c42be9d2930b
vba-macro oletools.olevba.extract_macros (decoded VBA source) 27190 bytes
Detection
ClamAV: Doc.Trojan.Linda-3
Obfuscation or payload: unlikely