PDF malware analysis — malicious · dc91e104b0adb509

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: f8baf5e4c24972a16f376c5b1b49fa03 SHA-1: 307e3d455a9209ba437d4dbbff3753a945e0a82e SHA-256: dc91e104b0adb5094c3fd9ccb7cb9bb290a545d9409ae0eea7a95b136242e498

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file was flagged as malicious by ClamAV with the signature Pdf.Exploit.Agent-36118. Static analysis revealed embedded JavaScript streams and a high-severity 'eval()' call, indicating the execution of arbitrary code. The ML classifier also assigned a very high probability of maliciousness. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, a common technique for PDF-based exploits.

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` `e0a237e253498caa5700fd66ecd8060b44afa4b3ae384fbbae8126173a913cb6`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	13297 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 26 long base64-like blob(s).
`javascript_obj0013_001.js` `b78dca18a634cdb45388ca34b12ea147eaf20db9b74a128e2c2f7876bf9aa2fb`	pdf-javascript-stream	PDF /JS object 13 at offset 0x359	14003 bytes
Detection ClamAV: Pdf.Exploit.Agent-36118 Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 26 long base64-like blob(s).

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