PDF malware analysis — malicious · 0177fdc798edc778

MALICIOUS

PDF

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

MD5: 29df1fb7be6a800b6bd17b328e0199ee SHA-1: 84bc6257de40739318f042d135d0f00935cefe4f SHA-256: 0177fdc798edc7780bc4bda0f5732b4711d3277c292e94da163a61b369a44e3e

268 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

This PDF file contains heavily obfuscated JavaScript, flagged by multiple heuristics as a PDF JavaScript exploit cluster. The JavaScript utilizes eval() calls and string manipulation, indicating an attempt to execute arbitrary code. The ClamAV detection of 'Pdf.Exploit.Agent-36118' further confirms its malicious nature, suggesting it's designed to exploit vulnerabilities and likely download additional malware.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 7

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.
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` `44ebda681b3fd664de44f10e139441bead9f1136b209e4db0a6274e7af515675`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	13648 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 4 long base64-like blob(s).
`javascript_obj0013_001.js` `0006245daa7ee726b6c68d6aef3e24841be44fe7bd5b50a044193f5594f06a05`	pdf-javascript-stream	PDF /JS object 13 at offset 0x359	14354 bytes
Detection ClamAV: Pdf.Exploit.Agent-36118 Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 4 long base64-like blob(s).

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