PDF malware analysis — malicious · 3a4baaf5bf4afa45

MALICIOUS

PDF

1.4 KB

MD5: 139a3f385fa8e720bd7413d6ddc7b80d SHA-1: 274022a972cce4afb83938aa5e716ec3b6b3895a SHA-256: 3a4baaf5bf4afa4593974315448f23b0a3755df7349a2878a8c7b45c56bebfcf

208 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

This PDF file contains embedded JavaScript, which is triggered by the CVE-2009-4324 vulnerability related to media.newPlayer. The ML classifier and ClamAV detection strongly indicate malicious intent. The JavaScript is likely used to download and execute a second-stage payload, a common technique for exploiting PDF vulnerabilities.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324

PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009. (matched in decompressed stream)
ClamAV: Pdf.Exploit.Agent-20165 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-20165
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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_obj111111_000.js` `6bce550f8a6eec271d750536f517cc254959927b96263380bd00ab8b65f78cbd`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1256 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`javascript_obj111112_001.js` `9504d9da0e2b01fc7fda3f686d04e3743e0098fdb902e1cd32727216d12c489a`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x486	264 bytes

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