PDF malware analysis — malicious · 706ae78264b094da

MALICIOUS

PDF

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

MD5: 2de0e45e0b6c5f3c6557e083a6056d3f SHA-1: 0541a2c16ede2305494ac4ef4b82805e7d1dd4d5 SHA-256: 706ae78264b094dae1a3d5a99ba7e040ff4354ec1416511f39cfeb67048997bb

268 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains embedded JavaScript that is heavily obfuscated and utilizes eval() calls, indicating malicious intent. Heuristic analysis and ClamAV detection confirm this is a known exploit targeting PDF viewers. The JavaScript is designed to download and execute a secondary payload, as evidenced by the obfuscated code and the presence of multiple JavaScript streams.

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` `a08b699a0f91be827bb60b931bc9c48853834c805fb9fd5defafc9549a2f4576`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	13365 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 8 long base64-like blob(s).
`javascript_obj0013_001.js` `e68b070d5a125cce79579649f1b729cb29647db23f6d78d811930a181f011604`	pdf-javascript-stream	PDF /JS object 13 at offset 0x359	14071 bytes
Detection ClamAV: Pdf.Exploit.Agent-36118 Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 8 long base64-like blob(s).

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