PDF malware analysis — malicious · 4c8820ff645114e1

MALICIOUS

PDF

1.9 KB

MD5: 47f355684ff24ef7ed95ed112720519c SHA-1: 0793c9a3489b9b049f8067317721cc6fba98106b SHA-256: 4c8820ff645114e1955125463594c3e60ceefb5295ebe371fe8fe2021f317d27

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that utilizes the unescape function and targets the CVE-2009-4324 vulnerability via the media.newPlayer object. This JavaScript is obfuscated and likely designed to download and execute a second-stage payload. The ClamAV detection 'Pdf.Exploit.JSCode-1' further supports the malicious nature of the embedded script.

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.
ClamAV: Pdf.Exploit.JSCode-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.JSCode-1
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits
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_obj0005_000.js` `4acbab9938f0aad0e7a8853c19bf2029286d16ffd02e4720419f47847386a360`	pdf-javascript-stream	PDF /JS object 5 at offset 0x10A	1478 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0005_001.js` `66b0e774d674fcf97f0a730404863c25d04e72e02edcf7e6c2a4581b1295b317`	pdf-javascript-stream	PDF /JS object 5 at offset 0x10A	40 bytes

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