PDF malware analysis — malicious · 79b5643e419f02f0

MALICIOUS

PDF

2.6 KB

MD5: d5172d62d0d49b698b50e1306a8dcc64 SHA-1: 0133962213da7ec28c2a60a7e308d34c46940c4a SHA-256: 79b5643e419f02f01ffda3571006969bb72d1597feae611de917de5a51696fb4

206 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript, which utilizes eval() and unescape() functions, indicating obfuscation. A high ML classifier score and ClamAV detection as 'Pdf.Dropper.Agent-5341878-0' strongly suggest malicious intent. The embedded JavaScript is likely responsible for downloading and executing a secondary payload, a common technique for PDF-based malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

ClamAV: Pdf.Dropper.Agent-5341878-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-5341878-0
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
unescape() call high PDF_UNESCAPE

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

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0009_000.js` `7ba34b5827b6048ef3c57694eb41f9de88048cf54531a9f770606878fe4e9aa3`	pdf-javascript-stream	PDF /JS object 9 at offset 0xEF	8864 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s). Carved artifact contains 20 long hex-escaped blob(s).

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