PDF malware analysis — malicious · b7979169b2f21a42

MALICIOUS

PDF

70.1 KB Created: ÜÐ037ß)G034BG§&±x¾æÂËô.s First seen: 2026-05-10

MD5: 0fec6bd1eefb1b170d68169d394e577a SHA-1: d249137b8e4d950b2c8853a18c804231db0d6455 SHA-256: b7979169b2f21a422a18aaa5a770216b52bcd84dc044525bb8311a27b78e9e1d

150 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.001 Spearphishing Attachment T1027 Obfuscated Files or Information

The PDF file is encrypted and contains embedded JavaScript, indicating an attempt to conceal malicious activity. The heuristic 'PDF_ENCRYPTED_WITH_JS' strongly suggests that the JavaScript is used to bypass static analysis and potentially deliver a malicious payload. The embedded URL 'http://www.cadkas.com' is likely part of the lure or infrastructure. The presence of JavaScript actions and streams points to an obfuscated execution flow, common in phishing or credential theft attempts.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

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.
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.
Encrypted PDF carries /JavaScript — payload hidden from static analysis high PDF_ENCRYPTED_WITH_JS

PDF declares /Encrypt and also references an executable trigger (/JavaScript). Document encryption hides the JavaScript body and stream contents from static scanners — combined with auto-execution indicators this is a known evasion pattern used to deliver weaponised JavaScript that the analyst cannot inspect without the decryption key.
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.
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.cadkas.com In PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0020_000.js`	pdf-javascript-stream	PDF /JS object 20 at offset 0x69F8	46 bytes
SHA-256: `d3b3619843a9765d54ecc0d81f8728e633434bc486e3888d07256848d199d3df`
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
Preview script First 1,000 lines of the extracted script eval('eval("'+this.getField("e").value+'");');
`javascript_obj0021_000.js`	pdf-javascript-stream	PDF /JS object 21 at offset 0x1847	46 bytes
SHA-256: `11dd3dd5217a269b6e477c77d269b1bf182a5c6d0f312ad5b43892728b614d88`
Preview script First 1,000 lines of the extracted script x�h��W�ۣ� y� `�]��ӎg_u�� v � j�T[�7ا�R��

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