Malicious PDF — malware analysis report

Static analysis result for SHA-256 34f8853c9359a8c4…

MALICIOUS

PDF

88.6 KB
MD5: 42dae4ab36584ff057a5eb1f0d109db5 SHA-1: 4faa62fed601a436cf86d3e402d646dbaa622131 SHA-256: 34f8853c9359a8c44016d38b760e7bdc3c1f8912151d89da0b3a3fe252c5d6e8
212 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1566.001 Spearphishing Attachment T1204.002 Malicious JavaScript

The PDF file contains critical XFA heap spray exploit code and embedded JavaScript, indicating it is designed to execute malicious scripts upon opening. The presence of XFA form elements and JavaScript actions strongly suggests an attempt to leverage known vulnerabilities within PDF viewers. The embedded script is likely responsible for downloading and executing a second-stage payload, though its exact function is obscured by obfuscation.

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
6aef3e1ee5663060c04735a068633d0bc9a9b0ccf09651d8e78bff8726fd1d8a		 pdf-embedded-script PDF raw stream script payload at offset 0x44D 89556 bytes

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