PDF malware analysis — malicious · f1d8f2a4521bde58

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: d9dc14677d88f8741a190158d513d6cc SHA-1: e5d0122a74d4710926ba5e55ae6a88c17f2e48d7 SHA-256: f1d8f2a4521bde58f32de330c64d140d6e657b0ddd95aed76041be117713d8c0

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript with multiple eval() calls, a common technique for obfuscating malicious code. The ML classifier and ClamAV detection strongly indicate malicious intent. The JavaScript appears to reconstruct and execute a command string, likely for downloading and running a secondary payload. The specific reconstructed command is 'eval(tts dff[jio ol])'.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Exploit.Agent-36118 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36118
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_000.js` `d43aa6cdbd472ad358892f28678d1d3f8c2530b8c1accbbdf97231ba7a55820e`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	13341 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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