PDF malware analysis — malicious · d35782684cc89402

MALICIOUS

PDF

14.7 KB Created: 2008-07-26 19:43:58 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: d86f2c15266fdc3ce0c3963882f84ade SHA-1: b54b8109339dee003186286c98af8ae40fcfb0f8 SHA-256: d35782684cc89402a68f67de43ea16f1bfa96d4fb343348664e7c06c365e9c8e

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript

The PDF file contains embedded JavaScript with multiple obfuscation techniques, including string concatenation and the use of eval(). Heuristics indicate the presence of JavaScript actions and eval() calls, strongly suggesting malicious code execution. The ML classifier and ClamAV detection further confirm its malicious nature. The script appears to be designed to download and execute a second-stage payload, as indicated by the eval() call and the structure of the obfuscated code.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

ClamAV: Pdf.Exploit.Agent-36118 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36118
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_000.js` `68db737c00238c8d12fab7b2cf99b414024a11ae529565394719b50982461550`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	13453 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 6 long base64-like blob(s).
`javascript_obj0013_001.js` `8b06880bdf2fa270848c0592433784d70c572416f33486008b9166c6c8e16dba`	pdf-javascript-stream	PDF /JS object 13 at offset 0x359	14159 bytes
Detection ClamAV: Pdf.Exploit.Agent-36118 Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 6 long base64-like blob(s).

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