PDF malware analysis — malicious · aaa5bc401fbfb00a

MALICIOUS

PDF

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

MD5: de2397cb529e02f38a285b962ce28f94 SHA-1: aa1631fae684d9c0a7fdd75291d3a2bb2a1c27d4 SHA-256: aaa5bc401fbfb00af03e531c26cd96ecbd557ef846d16a87dd46bc2d7de528d9

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

This PDF file contains embedded JavaScript that utilizes eval() calls, a common technique for obfuscating malicious code execution. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically targeting PDF vulnerabilities. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, as suggested by the heuristic firings and the nature of eval() usage in exploit documents.

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` `f8d7e80ebaef4ee870c029fa557729d6694a0c901471f05118feeca43d0452e6`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	13312 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 10 long base64-like blob(s).
`javascript_obj0013_001.js` `6d11a4965f4542dc8d0b8dcb51f32026a4f6efb1e0082de0990917933ce4e4a0`	pdf-javascript-stream	PDF /JS object 13 at offset 0x359	14018 bytes
Detection ClamAV: Pdf.Exploit.Agent-36118 Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 10 long base64-like blob(s).

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