PDF malware analysis — malicious · 5226c8f415ae2b25

MALICIOUS

PDF

2.1 KB

MD5: f45a9f4b8391391e95dfae28b1e8815d SHA-1: ea4e3fed5c2f20b4085ed44f837ba04b616924b9 SHA-256: 5226c8f415ae2b2569573c91bcb626cc1d7d045d8c0c1ff5bddbcd9d0aeba8bc

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

The PDF sample contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_UNESCAPE. A critical heuristic identifies the CVE-2009-4324 vulnerability related to media.newPlayer, suggesting exploitation. The embedded JavaScript, particularly the 'javascript_obj0005_000.js' artifact, likely attempts to download and execute a second-stage payload, as suggested by the ClamAV detection 'Pdf.Exploit.JSCode-1'.

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` `b3921ab82d3eef9dfe2cc00bfb2ebe554eefc7c8dc5cb5d4340db968b3899df0`	pdf-javascript-stream	PDF /JS object 5 at offset 0x124	1603 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0005_001.js` `59fccee3f5bb56702d540552e378583a8e0e9075eaffdf6e5551c9551f085fed`	pdf-javascript-stream	PDF /JS object 5 at offset 0x124	49 bytes

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