PDF malware analysis — malicious · 141ba50799d52e59

MALICIOUS

PDF

6.3 KB

MD5: 968db448b6cec8a17e94171e975c735d SHA-1: 7015f0424fa551fcbe951fa5be15d605dc537003 SHA-256: 141ba50799d52e595e3a3ea578ea9a228a2f6b01f609b0b189f2a612bd777a37

68 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript streams that are obfuscated but appear to be designed to download and execute a payload from a remote URL. The ML classifier strongly indicates maliciousness, and the extracted URL is the primary indicator of compromise. The JavaScript's obfuscated nature and the embedded nature of the exploit suggest a common pattern for delivering further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

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.
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.
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://www2.safecleaneryx.it.cx/?x5ej4=nJjSznHY2cuL2NXJnqOdoqme7KnRp2yklZuVl5yekqGWmO3rtWaYnWypkZmXmKWLzeGio6mosFvGzJblnri5rpLVytKipZ%2FrnA%3D%3D

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0005_000.js` `b644fde82bb72d82b30bcb7360caa02a40098d442c0d33875b1103fe8a7594e3`	pdf-javascript-stream	PDF /JS object 5 at offset 0x1A6	5737 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s). Carved artifact contains 1 long hex-escaped blob(s).
`javascript_obj0005_001.js` `0d643dc253ead6861b427bbc9f0690dc4f05cb067eacda247f158fb1ca511b0f`	pdf-javascript-stream	PDF /JS object 5 at offset 0x1C9	6020 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s). Carved artifact contains 1 long hex-escaped blob(s).

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