PDF malware analysis — malicious · 0c63b88d1c283c94

MALICIOUS

PDF

6.6 KB

MD5: e441c7acc5ce6f36a65da93957605ec1 SHA-1: 3f6747c0ec2b7eddbea8335e484c4dccc7586479 SHA-256: 0c63b88d1c283c94212fe6aff97d724b894b929b48e95f116d0454bdf35a981d

68 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The sample is a PDF file that contains embedded and obfuscated JavaScript. This script is responsible for downloading a second-stage payload from the URL http://www2.personalro-scaner.it.cx/. The ML classifier strongly indicates maliciousness, and the presence of JavaScript actions and embedded JS streams further supports this. The primary goal appears to be the execution of arbitrary code via the downloaded payload.

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.personalro-scaner.it.cx/?fi31h=isyglaXV3deZ5NfFqaelZKyJ1eLRr5iaZWaepMin1afUh%2BDlrF6mlpakmaSfmWxX1OOio6OfpofN1NGfsLW1uYviz81wZI7jiQ%3D%3D

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0005_000.js` `4693103ac4cf5eba4b0c4d075bb9454097c1c405d4f612222e664005e4b2c883`	pdf-javascript-stream	PDF /JS object 5 at offset 0x1B5	6027 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` `5f192fcf548bc3a58943f0bd6512aea787f34770458a087e23eb4c71c0317cd8`	pdf-javascript-stream	PDF /JS object 5 at offset 0x1D8	6310 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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