Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfdfebff9cd37211…

MALICIOUS

PDF

82.6 KB
MD5: 4055bbd04df4dde31814f0a462a3a70e SHA-1: a56eb8d6f7475eeed80855ba621bda73c0ec7edb SHA-256: dfdfebff9cd37211e1761ef0500abbf41ef46259b4c8043ace52f9833ecf31fa
148 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF file contains an embedded script payload within an XFA form, as indicated by multiple critical heuristic firings including ClamAV detections for 'Pdf.Exploit.Agent-6136306-0' and 'Pdf.Exploit.Agent-36769'. The presence of XFA suggests an attempt to exploit vulnerabilities within Adobe's XML Forms Architecture. The embedded script is likely responsible for executing the malicious payload, leading to the overall malicious verdict.

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
84a31e9812e1da0debf1c7c45303920ef177abf2946f4451a680a50d179b47c1		 pdf-embedded-script PDF raw stream script payload at offset 0x246 83839 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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