PDF malware analysis — malicious · 4b00ed4772d35026

MALICIOUS

PDF

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

MD5: 941229a8663a9264b20278fe0cabe3a9 SHA-1: 2cb4cfc980a2ca2dae00cfbc08f9cfc176209314 SHA-256: 4b00ed4772d350266b20022ca613608a52cba0ca3e320c27e66438d4838492cf

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript with multiple eval() calls, indicating obfuscated code execution. The ClamAV detection 'Pdf.Exploit.Agent-36118' and the presence of JavaScript heuristics confirm the malicious nature. The script likely attempts to download and execute a second-stage payload, as suggested by the eval() calls and the 'Suspicious extracted artifact' heuristic. The reconstructed eval string 'eval(tts dff[jio ol])' is the primary IOC.

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` `34cdd23aae8dabd5e026689fa916f285f8a0ede32b15415fd92f790bb36e9b58`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	13629 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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