PDF malware analysis — malicious · 443d25f1bcacb1df

MALICIOUS

PDF

112.4 KB

MD5: 59c99b168ff2b58040bda0c726141215 SHA-1: a34dbe5da7332e5a5b66a137807ccf88f6e7ede1 SHA-256: 443d25f1bcacb1dfda3a5e67af3c8622de9f8240b92eb983a6a170f101eb9fb2

196 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that is obfuscated using unescape() calls and string concatenation, indicative of exploit delivery. Heuristics confirm the presence of JavaScript actions and an embedded JS stream, specifically triggering CVE-2009-4324 related to media player exploits. ClamAV also detected this as Pdf.Exploit.Agent-30325. The embedded JavaScript is likely responsible for downloading and executing a secondary payload, as suggested by the 'Suspicious extracted artifact' heuristic.

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. (identified after JavaScript deobfuscation)
ClamAV: Pdf.Exploit.Agent-30325 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-30325
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
Suspicious extracted artifact medium 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.
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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0008_000.js` `6b1b08d15d0373294e058c013e875239e47c46d56178196ed4d29af6073970b5`	pdf-javascript-stream	PDF /JS object 8 at offset 0x210	2960 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 3 long hex-escaped blob(s).
`legacy_pdfkit_stage_000.js` `42c3f4df375ff6f58ff655cc4f88b5cc28f0dd33b978390db3538684a6219b74`	deobfuscated-js	string-concatenation normalized Acrobat API aliases at offset 0x210	126 bytes

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