Malicious PDF — malware analysis report

Static analysis result for SHA-256 e05ad299bc77a03e…

MALICIOUS

PDF

104.4 KB
MD5: ef93285f099e9a386d3c27fa03762196 SHA-1: 4aaae39233546fe246cde9f24f22d34270ddf7e0 SHA-256: e05ad299bc77a03ef8988861a7f6a47148ed1683e91ed7c6c4a9f8f8193a2089
278 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains XFA (XML Forms Architecture) which is known to be vulnerable to heap spray attacks. Heuristics indicate the presence of XFA JavaScript heap-spray exploit code and embedded script payloads. The ML classifier and ClamAV detections strongly suggest malicious intent. The embedded URLs, while not directly malicious, are part of the XFA structure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • XFA form contains risky executable script high CVE related PDF_XFA_SCRIPT
    PDF embeds an XFA form whose script block contains exploit, submission/launch, or shell-execution primitives. Ordinary LiveCycle print/update scripts are left as generic XFA/JS signals unless stronger behavior is present.
  • XFA JavaScript heap-spray exploit code critical PDF_XFA_HEAP_SPRAY
    PDF contains XFA script content with heap-spray or shellcode-like JavaScript markers such as large encoded word sequences, util.pack, large arrays, or spray variable names. This is a weaponised Adobe Reader exploit pattern, not a normal interactive form.
  • 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_0000023d.bin
d7a59d79bc0a7667d41b2f2434f4c8808ceae849d86c0ca7e50e6cdba76f6e3c		 pdf-embedded-script PDF raw stream script payload at offset 0x23D 106235 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36370
Obfuscation or payload: unlikely

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