Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb81ec25096ee14d…

MALICIOUS

PDF

461.7 KB Created: 2010-03-13 19:10:09 +08:00 Authoring application: Adobe LiveCycle Designer ES 8.2 First seen: 2026-05-11
MD5: a150b9a0f0b81872ecec2c9ed18d4c96 SHA-1: a56c91eea24b74639fbb408592344adc4b957819 SHA-256: eb81ec25096ee14d3f870eeaafe968377cc3a2855e7aa19866648aa0a1bdc5d7
114 Risk Score

Malware Insights

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

The PDF file exhibits multiple indicators of suspicious activity, including embedded JavaScript streams and XFA forms. The presence of these elements, coupled with the 'PDF_JAVASCRIPT' and 'PDF_XFA' heuristic firings, indicates a potential for malicious code execution or exploitation. While the document body is unreadable, the structure suggests it may be a lure. The embedded JavaScript, though not fully analyzed due to its size, is likely responsible for delivering a secondary payload or exploiting a vulnerability. The benign reputation of the extracted URLs does not negate the suspicious nature of the embedded content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 9

  • PDF embedded file could not be fully decoded medium PDF_EMBEDDED_FILE_UNDECODED
    A declared PDF /EmbeddedFile stream uses filters that the scanner could not decode. The raw stream was carved for artifact triage because malformed or unsupported attachment filters can hide payload content from normal extraction.
  • Suspicious extracted artifact medium 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.
  • JavaScript action low 1 related finding 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.
  • 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
  • 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
  • PDF paints image(s) but contains no text operators info PDF_IMAGE_ONLY_LURE
    PDF has 2 image XObject(s) and the content stream contains no text-emitting operators (BT/ET, Tj, TJ, ', ") in either raw bytes or decompressed streams — this is the screenshot-as-PDF pattern used to bypass text-based scanners and to deliver instructions purely through rendered pixels. It is informational unless paired with invisible links or risky URI context.
  • 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# Referenced by PDF JavaScript
    • http://ns.adobe.com/xap/1.0/Referenced by PDF JavaScript
    • http://ns.adobe.com/pdf/1.3/Referenced by PDF JavaScript
    • http://ns.adobe.com/xap/1.0/mm/Referenced by PDF JavaScript
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/xfa/promoted-desc/Referenced by PDF JavaScript
    • http://cgi.adobe.com/special/acrobat/updateReferenced by PDF JavaScript
    • http://www.xfa.org/schema/xci/1.0/Referenced by PDF JavaScript
    • http://www.xfa.org/schema/xci/2.8/Referenced by PDF JavaScript
    • http://www.xfa.org/schema/xfa-template/2.1/Referenced by PDF JavaScript
    • http://www.xfa.org/schema/xfa-locale-set/2.7/Referenced by PDF JavaScript
    • http://www.xfa.org/schema/xfa-locale-set/2.1/Referenced by PDF JavaScript
    • http://ns.adobe.com/xdp/Referenced by PDF JavaScript
    • http://www.xfa.org/schema/xfa-form/2.8/Referenced by PDF JavaScript
    • http://www.xfa.org/schema/xfa-data/1.0/Referenced by PDF JavaScript

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 13

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0002.bin pdf-embedded-file PDF EmbeddedFile object 2 at offset 0x57 1475 bytes
SHA-256: e1624aa7dd8a1e059831c1e54bfc8f287e72098aeb0373c67a017e36590a0c43
embedded_file_obj0003.bin pdf-embedded-file PDF EmbeddedFile object 3 at offset 0x315 1351 bytes
SHA-256: 603e53b7b90bcbbb155e0d09a3fadfc09fee609995453dd22e90dc2ffc40c391
embedded_file_obj0004.bin pdf-embedded-file PDF EmbeddedFile object 4 at offset 0x606 3023 bytes
SHA-256: 7a3baf6cd7005199e771f5fac95d2162e961b145b52976bfa7d0f32a10c9758d
embedded_file_obj0005.bin pdf-embedded-file PDF EmbeddedFile object 5 at offset 0x997 1147 bytes
SHA-256: 481e893332602e1d39ae1c6001aff9976442abbb4f02e3f6cfd7a80f6ceec720
embedded_file_obj0056.bin pdf-embedded-file PDF EmbeddedFile object 56 at offset 0x72969 85 bytes
SHA-256: c06dcd026a7ea0536b63e07ce688691b585339a3ab7ff59065e546b56308c7bb
embedded_file_obj0057.bin pdf-embedded-file PDF EmbeddedFile object 57 at offset 0x72A1C 212 bytes
SHA-256: 966e122c41d06a1203d0878bc821a3e94856ad8064f9fc0137f293fa3aebf3c6
embedded_file_obj0058.bin pdf-embedded-file PDF EmbeddedFile object 58 at offset 0x72B21 1372 bytes
SHA-256: 3dae9a4fa7af8d48a81be83aad61690cdee91bcd425e70342ab11668573f2018
temp.jpg pdf-embedded-file-undecodable PDF EmbeddedFile object 55 at offset 0xCF33; filter decode failed 416221 bytes
SHA-256: 192495bd1a4263fd7833267796ed7e28775fc62ca618e7e0b82c267855d051ed
javascript_obj0033_000.js pdf-javascript-stream PDF /JS object 33 at offset 0x8703 1604 bytes
SHA-256: f979542c4992f256c12537db5bbe5f86605da11ef877e634ccfc2c47c9284b10
Preview script
First 1,000 lines of the extracted script
if (typeof(xfa_installed) == "undefined" || typeof(xfa_version) == "undefined" || xfa_version < 1.2)
{
   if (app.viewerType == "Reader")
   {
      if (ADBE.Reader_Value_Asked != true)
      {
         if (app.viewerVersion < 6.01)
         {
            if (app.alert(ADBE.Viewer_Form_string_Reader_Older, 1, 1) == 1)
               this.getURL(ADBE.Reader_Value_New_Version_URL + ADBE.SYSINFO, false);
         }
         else
         {
            if (app.alert(ADBE.Viewer_Form_string_Reader_601, 1, 1) == 1)
               app.findComponent({cType:"Plugin", cName:"XFA",
                                   cDesc: ADBE.Viewer_string_Update_Reader_Desc});
         }
         ADBE.Reader_Value_Asked = true;
      }
   }
   else
   {
      if (ADBE.Viewer_Value_Asked != true)
      {
         if (app.viewerVersion == 6)
         {
            app.response({cQuestion: ADBE.Viewer_Form_string_Viewer_60,
            cDefault: ADBE.Viewer_Value_New_Version_URL + ADBE.SYSINFO,
            cTitle: ADBE.Viewer_string_Title});
         }
         else if (app.viewerVersion < 6)
         {
            app.response({cQuestion: ADBE.Viewer_Form_string_Viewer_Older,
            cDefault: ADBE.Viewer_Value_New_Version_URL + ADBE.SYSINFO,
            cTitle: ADBE.Viewer_string_Title});
         }
         else
         {
            if (app.alert(ADBE.Viewer_Form_string_Viewer_601, 1, 1) == 1)
                app.findComponent({cType:"Plugin", cName:"XFA",
                                   cDesc: ADBE.Viewer_string_Update_Desc});
         }
         ADBE.Viewer_Value_Asked = true;
      }
   }
}
javascript_obj0034_001.js pdf-javascript-stream PDF /JS object 34 at offset 0x88EE 902 bytes
SHA-256: 3bf84668674e23c91aaaa6c58c24a1f80a30566e9cfbd09040882d18101fed76
Preview script
First 1,000 lines of the extracted script
if (typeof(ADBE.Reader_Value_Asked) == "undefined")
   ADBE.Reader_Value_Asked = false;
if (typeof(ADBE.Viewer_Value_Asked) == "undefined")
   ADBE.Viewer_Value_Asked = false;
if (typeof(ADBE.Reader_Need_Version) == "undefined" || ADBE.Reader_Need_Version < 6.01)
{
   ADBE.Reader_Need_Version = 6.03
   ADBE.Reader_Value_New_Version_URL =
       "http://cgi.adobe.com/special/acrobat/update";
   ADBE.SYSINFO = "?p=" + app.platform + "&v=" + app.viewerVersion + "&l="
       + app.language + "&c=" + app.viewerType + "&w=" + "XFA1_5";
}
if (typeof(ADBE.Viewer_Need_Version) == "undefined" || ADBE.Viewer_Need_Version < 6.01)
{
   ADBE.Viewer_Need_Version = 6.03;
   ADBE.Viewer_Value_New_Version_URL =
       "http://cgi.adobe.com/special/acrobat/update";
   ADBE.SYSINFO = "?p=" + app.platform + "&v=" + app.viewerVersion + "&l=" 
       + app.language + "&c=" + app.viewerType + "&w=" + "XFA1_5";
}
javascript_obj0035_002.js pdf-javascript-stream PDF /JS object 35 at offset 0x8A5B 2844 bytes
SHA-256: bb2fe1c0b366bd3a48235c04e822305ef3ab04e575e155f93e34004f56cc10ec
Preview script
First 1,000 lines of the extracted script
�� i f   ( t y p e o f ( t h i s . A D B E )   = =   " u n d e f i n e d " ) 
       t h i s . A D B E   =   n e w   O b j e c t ( ) ; 
 A D B E . L A N G U A G E   =   " E N U " ; 
 A D B E . V i e w e r _ s t r i n g _ T i t l e   =   " A d o b e   A c r o b a t " ; 
 A D B E . V i e w e r _ s t r i n g _ U p d a t e _ D e s c   =   " A d o b e  N�N��hSUf�e� " ; 
 A D B E . V i e w e r _ s t r i n g _ U p d a t e _ R e a d e r _ D e s c   =   " A d o b e   R e a d e r   7 . 0 . 5 " ; 
 A D B E . R e a d e r _ s t r i n g _ N e e d _ N e w _ V e r s i o n _ M s g   =   "kd   P D F  e�N���lBf���rHg,v�   A d o b e   R e a d e r0 ��c	  xn[�  geN �}g e�rHg,� b �T|�`�v�|�~�{�t TX0  " ; 
 A D B E . V i e w e r _ F o r m _ s t r i n g _ R e a d e r _ 6 0 1   =   "kd   P D F  �hSU��lBf���rHg,v�   A d o b e   R e a d e r0 �}q6�hSUw �wgel�g	�� OFg�N�QC} [��EN
e�l�kc^8bg�L� u ��e�l�f>y:0 ��c	  xn[�  T/R�W(~�f�e�� b �T|�`�v�|�~�{�t TX0  " ; 
 A D B E . V i e w e r _ F o r m _ s t r i n g _ R e a d e r _ O l d e r   =   "kd   P D F  �hSU��lBf���rHg,v�   A d o b e   R e a d e r0 �}q6�hSUw �wgel�g	�� OFg�N�QC} [��EN
e�l�kc^8bg�L� u ��e�l�f>y:0 c	  xn[�  ��S�W(~�N �}O�`o� b �T|�`�v�|�~�{�t TX0  " ; 
 A D B E . V i e w e r _ F o r m _ s t r i n g _ V i e w e r _ 6 0 1   =   "kd   P D F  �hSU��lBf���rHg,v�   A d o b e   A c r o b a t0 �}q6�hSUw �wgel�g	�� OFg�N�QC} [��EN
e�l�kc^8bg�L� u ��e�l�f>y:0 ��c	  xn[�  T/R�W(~�f�e�� b �T|�`�v�|�~�{�t TX0  " ; 
 A D B E . V i e w e r _ F o r m _ s t r i n g _ V i e w e r _ 6 0   =   "kd   P D F  �hSU��lBf���rHg,v�   A d o b e   A c r o b a t0 �}q6�hSUw �wgel�g	�� OFg�N�QC} [��EN
e�l�kc^8bg�L� u ��e�l�f>y:0 ��Y
R6N�N  QW@�  W i n d o w s�  C T R L + C�  M a c�  C o m m a n d + C�	� q6T |��4R0`�v�mO��VhN-N僷S֋�~�O�`o� b �T|�`�v�|�~�{�t TX0  " ; 
 A D B E . V i e w e r _ F o r m _ s t r i n g _ V i e w e r _ O l d e r   =   "kd   P D F  �hSU��lBf���rHg,v�   A d o b e   A c r o b a t0 ��Y
R6�� QW@� q6T |�^ R0`�v�mO��VhN-� b �T|�`�v�|�~�{�t TX0  " ; 
 A D B E . V i e w e r _ F o r m _ s t r i n g _ R e a d e r _ 5 x   =   "kd   P D F  �hSU��lBf���rHg,v�   A d o b e   R e a d e r0 �}q6�hSUw �wgel�g	�� OFg�N�QC} [��EN
e�l�kc^8bg�L� u ��e�l�f>y:0 Y�g� Q~�S�u(� ��SUQ�  xn[�  bS_ mO��Vh� ��c���SS�g e�rHg,v� Q�u0  " ; 
 A D B E . V i e w e r _ F o r m _ s t r i n g _ R e a d e r _ 6 _ 7 x   =   "kd   P D F  �hSU��lBf���rHg,v�   A d o b e   R e a d e r0 �}q6�hSUw �wgel�g	�� OFg�N�QC} [��EN
e�l�kc^8bg�L� u ��e�l�f>y:0 Y�g� Q~�S�u(� ��SUQ�  xn[�  N �}^v[���g e�v�rHg,0  " ; 
 A D B E . V i e w e r _ F o r m _ s t r i n g _ V i e w e r   =   "kd   P D F  �hSU��lBf���rHg,v�   A d o b e   A c r o b a t0 Y�g�l�g	f���v�rHg,� \={�kd�hSUS�N�f>y:� OFS��e�l�kc^8]�O\0 � g�N��hSUQC} u ��h9g,N
f>y:0 Y�g�S�N��c�R0   I n t e r n e t� SUQ�  xn[�  S�N �}^v[���g e�rHg,0  " ;
xfa_image_rawvalue_000.tif pdf-xfa-image-tiff XFA image/rawValue TIFF payload near offset 0x72BA8 879 bytes
SHA-256: da819e52be8a108682eaa366c3b57bbb54f1908471416a4ae259b5062c5ba4eb
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Static shellcode analysis found candidate code region(s). Indicators: SC_EGG_HUNTER
font_00_cff_off00000bda.bin pdf-font-stream PDF embedded font (cff) at offset 0xBDA 31706 bytes
SHA-256: 76911b10d0e3a599e9481f5f3f875b0c2432bd33d8fdbfffa37a22aac7e76b24

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