Malicious PDF — malware analysis report

Static analysis result for SHA-256 548cef30a71e2402…

MALICIOUS

PDF

82.9 KB
MD5: 5eab881fa1d36484820e7ca996b7836e SHA-1: 32bd4701a05ee1e76ed7052bafc00982bf0adf14 SHA-256: 548cef30a71e2402fce2ae950a56fe15fe774d50ba1139a979ff984f627a4a06
148 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious Attachment T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file utilizes XFA forms, a known vector for embedding malicious scripts. ClamAV detections indicate it's a known exploit agent. The embedded script payload, though not directly readable in the provided excerpt, is the primary mechanism for delivering the malicious payload. The presence of XFA and embedded scripts strongly suggests an attack pattern aimed at exploiting vulnerabilities within PDF viewers.

Heuristics 5

  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • 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.
  • Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_00000246.bin
5223455b058dd3c13aceed833f394feafbd4db91615f605e96778c55e7f2a1ec		 pdf-embedded-script PDF raw stream script payload at offset 0x246 84199 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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