PDF malware analysis — malicious · f22906551ce0f95e

MALICIOUS

PDF

1.4 KB

MD5: 439ca95cc7de96dacc13ed7c9a1c525b SHA-1: baf3c31e4816260547438aeec93b1329d08fbfa0 SHA-256: f22906551ce0f95e804441be658883dc280ad22cca4f145b61761d4ad6b9621b

196 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. A critical heuristic identifies the CVE-2009-4324 vulnerability related to media.newPlayer, suggesting the JavaScript is used to exploit this flaw. The presence of decoded streams and an unescape() call points to obfuscated JavaScript, which is common for downloading and executing further malicious content. The ClamAV detection further confirms its malicious nature. The primary attack vector appears to be exploiting CVE-2009-4324 via JavaScript.

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-17538 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-17538
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_obj111111_000.js` `4d71fc0df953d153b996acc0da3cd14bf41a0129338c785184ddb811f4e87247`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1275 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` `5648a33b7dab128c801436a12f2a4519189549f1c7a718a6d46c3e86a781857c`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x493	269 bytes

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