Malicious PDF — malware analysis report

Static analysis result for SHA-256 a50f951c8777b62b…

MALICIOUS

PDF

88.5 KB
MD5: 72093a9bf2490d0f3989c7b5fb6894a7 SHA-1: 5e189fb4a1fa7e4b95b61bdd26f5cb166afede49 SHA-256: a50f951c8777b62b00708c39a93b750987ff6adb8bfe1d248844560538f19c60
212 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1059.007 JavaScript

The PDF file contains XFA form elements which are known to be vulnerable to heap spray attacks. Critical heuristics indicate the presence of XFA JavaScript heap-spray exploit code and risky executable script within the form. This script is likely designed to download and execute a second-stage payload, as suggested by the embedded script artifact. The ClamAV detection further confirms the malicious nature of the file.

Heuristics 9

  • 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
  • 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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • AcroForm button with action trigger low PDF_ACROFORM_BUTTON
    PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
  • 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_0000044d.bin
a191a87163695ee9993d70294e59f636703f0eebca0b7d1a79b8d984565748ef		 pdf-embedded-script PDF raw stream script payload at offset 0x44D 89473 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.