PDF malware analysis — malicious · 393e7619151ccbe0

MALICIOUS

PDF

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

MD5: cd77e5ed960a942f17b5e5fc95cf902f SHA-1: 34bd9940edfa306383e6cfa670d3a251b2c865d2 SHA-256: 393e7619151ccbe0bb804d6433e2a2c81474d3cd878125065c61044391aa8747

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged by multiple high-severity heuristics, including PDF_JAVASCRIPT, PDF_JS, PDF_EVAL, and a critical ClamAV detection (Pdf.Exploit.Agent-36118). The embedded JavaScript streams, particularly javascript_obj0013_000.js and javascript_obj0013_001.js, contain heavily obfuscated code utilizing eval() calls. This strongly suggests the script's purpose is to download and execute a secondary malicious payload. The ML classifier also provided a near-perfect score for maliciousness.

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` `6fb63a9e88b4fbfb62e421b622a6d8e226b7be078b21f45e0e03f3a581d6dbb4`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	13792 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).
`javascript_obj0013_001.js` `dede76f945472e14534158e838b0dff0b8f02b943596e4fd98e5437d91e478fa`	pdf-javascript-stream	PDF /JS object 13 at offset 0x359	14498 bytes
Detection ClamAV: Pdf.Exploit.Agent-36118 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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