PDF malware analysis — malicious · 71eaaace8153aa28

MALICIOUS

PDF

6.3 KB

MD5: 98616707e65df940bd83caa76654f1e2 SHA-1: 6e61a7a55518c75ab8d1b66d5384cb1095d53e80 SHA-256: 71eaaace8153aa28ad30c44046a879544e9063ba94eca7586ddfabfad104ca22

68 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript that references a suspicious URL. This JavaScript is likely intended to download and execute a second-stage payload. The ML classifier and heuristic firings strongly indicate malicious intent, pointing towards a phishing or malware delivery attempt.

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.thebest-utholder.it.cx/?zw4dt0c7=ntqhyLGV25ya3c7GoqiqXq6a3OPYoZij3KxkmNlplWmpjtnVoqSnYK2pmqWllZyY5upxlqhhiZjWyteft8e%2FU%2BXdzKyfitiW

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0005_000.js` `62c9cc4ea29ea86d4661dcfe597007e2a5440827816d278e4225bb5f6dda43e7`	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` `9459d62b13f53b492a4d1fd031f698bf0bdc19da5d4281d9f03c1d8e0685565e`	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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