PDF malware analysis — malicious · c0ff68de770432b2

MALICIOUS

PDF

6.3 KB

MD5: 184a86a21cc78d3fe0744100504979a0 SHA-1: 4bb1358a73129bc5eecd6e0e9ca2de76b7a0952a SHA-256: c0ff68de770432b2ab55a52a508e79de1c896fe1fc3cb65b6a952dd64d7e0901

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file was flagged as malicious by an ML classifier and contained embedded JavaScript. The JavaScript appears to be heavily obfuscated, but the presence of embedded URLs and heuristic firings related to JavaScript actions strongly suggest it is designed to download and execute a second-stage payload. The obfuscated nature of the script and the lack of clear indicators for a specific family lead to an 'unknown family' classification.

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.savexh-defense.it.cx/?gbkdsjqx25=i8XYyLDP6d1YqtzFs5qumWaK2drRq6uWm5ebmKOjoqtjW%2BfUs5arm2WampmeoaWL09Wolqabl9mUl%2BWeyLnDjp3NyaOYlOaJ

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0005_000.js` `2cb25c3a2222e86cae03172feff063f506a0a814bf3a17a31b56ce57bfce97a8`	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` `9455bde23c00ba053f827f8e7f002c68f5ba578d81e10bec098fe99f3396cc3a`	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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