Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 86303a3d61b22cb3…

MALICIOUS

RTF / .DOC

77.1 KB Authoring application: Msftedit 5.41.15.1515
MD5: 8705abf16dfd184b4bdde23eaab1dda5 SHA-1: 8184f15ebfb6c5619fa73b355b714ba62e4d2328 SHA-256: 86303a3d61b22cb3e22445bbac886ba6a9cd753123ce5626649b7470a9884712
262 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object which, upon decoding, reveals a PE header in hex data. ClamAV detections confirm this artifact as malicious, specifically identifying it as Win.Trojan.Clicker-3799. This suggests the file is designed to deliver a malicious executable payload to the victim.

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
9e03f0a592e26ab8ebcf172f11300baa4c697ac827a1df93e8316510f5047008		 rtf-objdata-decoded RTF \objdata at offset 0xCF 34628 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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