PDF malware analysis — malicious · 1db779d6a14afd13

MALICIOUS

PDF

1.4 KB

MD5: 8d9c2f1f4ed329a4e877d81972a099c7 SHA-1: 687aefab4a95c92aa79a103626603f52d59a6473 SHA-256: 1db779d6a14afd139de60d9d3e1ea45367589c73fd28ff9cb47ec67f82354355

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript that is heavily obfuscated. The ML classifier and exploit cluster heuristics indicate this script is designed to exploit vulnerabilities within the PDF reader. The script attempts to reconstruct a URL from concatenated strings, likely for downloading a secondary payload. The reconstructed URL is 'https://www.google.com/search?q=malware'.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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.
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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.
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj263984_000.js` `a34d70181a1e78c62c40dfda5a6609689f7a7bcbc0c80f28b62342a6479059f9`	pdf-javascript-stream	PDF /JS object 263984 at offset 0x160	2176 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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