Malicious PDF — malware analysis report

Static analysis result for SHA-256 8304c68ecfe09b2a…

MALICIOUS

PDF

93.2 KB
MD5: 5a217c6d89942dae020c791c2b2c8dd5 SHA-1: 8a963c9d7d1ba153e295c6966f2948b44c29c07c SHA-256: 8304c68ecfe09b2a1bfc8ff37c17db4cdc51c543c2a5f650e797d2102a1cc65b
148 Risk Score

Malware Insights

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

The PDF file utilizes XFA forms, a known vector for exploitation. ClamAV detections indicate it's a malicious exploit agent. An embedded script payload was also identified, suggesting it's designed to download and execute a second-stage payload. The specific exploit and payload are not fully detailed by the static analysis.

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
cbbd05a15dc737950ac536bbd99fe1b36032dda578203ba4e8fc6542532763b9
pdf-embedded-script PDF raw stream script payload at offset 0x246 94712 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely