PDF malware analysis — malicious · 2648c7f81263ccbb

MALICIOUS

PDF

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

MD5: 6357081fa7081c8585657dcf3e37d5c7 SHA-1: b1ac3253157a601bc434bd36cad7c5a662496844 SHA-256: 2648c7f81263ccbbbded235f803ef3fbf6885c21ed0c4583de69f925d4efca7d

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript with multiple obfuscation layers, including string concatenation and eval() calls. The heuristic firings indicate PDF JavaScript execution and eval() usage, with ClamAV identifying it as Pdf.Exploit.Agent-36118. The embedded JavaScript likely attempts to download and execute a second-stage payload, as suggested by the obfuscated code and the presence of an extracted JavaScript file. The document body itself contains heavily obfuscated JavaScript that reconstructs strings like 'Math.fromCharCode' and 'eval', indicating a malicious intent to execute arbitrary code.

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` `2cbbfb8d8078217dd94a05942bf06dd82ed0c4c8a6da9a33bf3f00b00be8a25e`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	13507 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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