PDF malware analysis — malicious · fd5fdfc6c1cbcd44

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: 8b7c53d59ad6e4c320b802179b24aacc SHA-1: b73ba1386b7103b081f45b0357cb54ebc8d9e40f SHA-256: fd5fdfc6c1cbcd44936b2abfbb758b3216023daa80326f6d7bfde1674d8b7d29

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript with multiple layers of obfuscation, including the use of eval() and string concatenation. Heuristics indicate a PDF JavaScript action and an eval() call, strongly suggesting the execution of malicious code. The ClamAV detection 'Pdf.Exploit.Agent-36118' further confirms its malicious nature. The script's primary function appears to be downloading and executing a second-stage payload, as indicated by the eval() calls and string manipulation designed to construct executable 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` `5aea45ca7503ced03c00d5dad80e794e3f989cda4ad19c8419b84de284bdcfc7`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	13637 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 6 long base64-like blob(s).

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