Malicious PDF — malware analysis report

Heuristics 9

• JavaScript action low 2 related findings PDF_JAVASCRIPT
  PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules. (matched inside decoded stream)
• PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER
  PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
  Matched line in script

   var str_hinweis = { initialize: function(dialog) {},commit: function(dialog) { var results = dialog.store(); if(results['cb_1'] == true){xfa.resolveNode("Seite1.SAVE_FLAG").rawValue = '1';}  }, cb_1: function (dialog) {this.hasSelected = !this.hasSelected ;}, ok: function(dialog) { }, cancel: function(dialog) { }, description: {name: 'Hinweis', elements: [{type: 'view',align_children: 'align_left', elements: [{ type: 'static_text',name: 'Hinweis:',bold: true,font: 'dialog',height: 20 }, {type:  …
   eval(str_hinweis);
   var ret = app.execDialog(str_hinweis);

• 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. (matched inside decoded stream)
• Active content added after the PDF was signed medium PDF_SIGNATURE_POST_SIGN_MODIFICATION
  An incremental update appended AFTER the signed byte range introduces active content (/EmbeddedFile). Some of this can occur in legitimate form-fill (field scripts, a rewritten /Catalog), so it is suspicious rather than damning — but it is content the signer did not approve.
• 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.
• Embedded file low PDF_EMBEDDED
  PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
• XFA form low PDF_XFA
  PDF uses XML Forms Architecture — can contain script logic
• Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
  One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
• 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://www.w3.org/1999/02/22-rdf-syntax-ns# In PDF document text

  • http://ns.adobe.com/xap/1.0/In PDF document text
  • http://ns.adobe.com/xap/1.0/mm/In PDF document text
  • http://purl.org/dc/elements/1.1/In PDF document text
  • http://ns.adobe.com/pdf/1.3/In PDF document text
  • http://ns.adobe.com/xfa/promoted-desc/In PDF document text
  • http://www.xfa.org/schema/xfa-template/2.8/Referenced by PDF JavaScript
  • http://www.w3.org/1999/xhtmlReferenced by PDF JavaScript
  • http://www.xfa.org/schema/xfa-data/1.0/Referenced by PDF JavaScript
  • http://www.xfa.org/schema/xfa-template/2.5/Referenced by PDF JavaScript
  • http://cgi.adobe.com/special/acrobat/updateReferenced by PDF JavaScript
  • http://ns.adobe.com/xdp/In extracted file (embedded_file_obj0104.bin)
  • http://www.xfa.org/schema/xci/2.8/In extracted file (embedded_file_obj0105.bin)
  • http://www.xfa.org/schema/xfa-locale-set/2.7/In extracted file (embedded_file_obj0107.bin)
  • http://www.xfa.org/schema/xfa-locale-set/2.1/In extracted file (embedded_file_obj0107.bin)
  • http://ns.adobe.com/xtd/In extracted file (embedded_file_obj0109.bin)
  • http://ns.adobe.com/xfdf/In extracted file (embedded_file_obj0111.bin)
  • http://www.xfa.org/schema/xfa-form/2.8/In extracted file (embedded_file_obj0112.bin)
  • http://www.w3.org/2001/XMLSchema-instanceIn extracted file (embedded_file_obj1441.bin)

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