Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 a6c8019ad9e7ac58…

MALICIOUS

RTF / .DOC

77.1 KB Authoring application: Msftedit 5.41.15.1515
MD5: ca83ed10d800d0dd2687b5e05c2f7007 SHA-1: 0745b016f5b5452f030902841fbe2ab969a45aa3 SHA-256: a6c8019ad9e7ac5832f1fbca29e81517c7f4ebff8e480f2ff9aaa3138567e770
262 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1105 Ingress Tool Transfer

The RTF document contains an embedded OLE object which, upon inspection, is a PE executable. This is strongly indicative of a malicious document designed to deliver a payload. The ClamAV detection 'Win.Trojan.Clicker-3799' further supports this, suggesting the embedded executable is a trojan. The file's SHA256 hash is provided as a primary IOC.

Heuristics 7

  • PE header (with DOS stub) in hex data critical RTF_MZ_HEX
    Hex-encoded PE (MZ + DOS stub) found inside RTF — likely an embedded executable payload
  • ClamAV: Win.Trojan.Clicker-3799 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Clicker-3799
  • 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.
  • Package object class high RTF_OBJCLASS_PACKAGE
    OLE Package object — can wrap arbitrary files
  • OLE object data medium RTF_OBJDATA
    RTF contains 1 \objdata section(s) — embedded OLE objects
  • Embedded OLE object medium RTF_OBJEMB
    RTF contains \objemb — embedded OLE object
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000000cf.bin
cea98bdeb7df9d449239cbdc5ba98f12276e7354e8dbe31275accf0f11c052cd		 rtf-objdata-decoded RTF \objdata at offset 0xCF 34623 bytes
Detection
ClamAV: Win.Trojan.Clicker-3799
Obfuscation or payload: likely
Carved artifact entropy is 7.42, consistent with packed or encrypted content.

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