Malicious PDF — malware analysis report

Static analysis result for SHA-256 02a309bda7d7f546…

MALICIOUS

PDF

45.2 KB Authoring application: iText 2.1.7 by 1T3XT
MD5: b143c355a55b6c11ab3cd675f333ac72 SHA-1: cdce93176e9c580fe2a0fec1abcecd6679d01d8f SHA-256: 02a309bda7d7f546fe6ca194037aba4d6eb8d614380674dcdb591280ec243113
136 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF sample contains embedded JavaScript that is flagged as an exploit. The JavaScript is heavily obfuscated but appears to be designed to download and execute a second-stage payload. The presence of XFA forms and JavaScript actions strongly suggests exploitation of a PDF vulnerability. The specific URL http://www.bitstream.com is present in the document, though its reputation is unknown.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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.
  • ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX
    Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
  • JavaScript action low 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.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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://www.bitstream.com
    • http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xci/2.6/
    • http://www.xfa.org/schema/xfa-template/2.6/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0013_000.js
d135081da6129d5cca8ad76e8dd05e90d6c46d88c2832c160ce3a4685786b978		 pdf-javascript-stream PDF /JS object 13 at offset 0xA08C 3811 bytes
font_00_sfnt_off00000315.bin
eb8a5fb8b4f353f5a3fe1a86b6fad3b5984e0ee742fe46ebefca3fee39f54d0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x315 65932 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.