Malicious PDF — malware analysis report

Static analysis result for SHA-256 012201f9769c5442…

MALICIOUS

PDF

94.1 KB
MD5: ff93b2e70bddc95e85b3ad906b39247a SHA-1: cbac4e5d0a1893e9bfa1eae08c90f5c3bfc203f2 SHA-256: 012201f9769c5442c48aeb0e62a831339fcfcd5aeb703ea35865408183fd32bb
180 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File Execution T1204.002 Malicious File Execution: User Execution

The PDF utilizes XFA forms and contains an embedded script payload, as indicated by multiple high-severity heuristics. ClamAV detections confirm its malicious nature, identifying it as Pdf.Exploit.Agent. The embedded script, though truncated, appears to be obfuscated JavaScript intended to download and execute a second-stage payload, a common technique for malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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
c31e6bf47fcb44fd3c9a6cdda621cef67d13acd08768f7bfdb292b4322e3b991		 pdf-embedded-script PDF raw stream script payload at offset 0x246 95638 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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