PDF malware analysis — malicious · fb78208c65264d28

MALICIOUS

PDF

1.9 KB

MD5: 379ff4329d9cc4147cfe9aca1a88bfd1 SHA-1: 9e4868c1e0cdadcd8fa88125a03ca32489e66941 SHA-256: fb78208c65264d28d1497b5decf6f021b60a6bd6588c856f4b402aa871fc7a95

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 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 player exploitation. The embedded JavaScript uses an 'unescape()' call, a common obfuscation technique, and the 'spray_heap' function suggests heap spraying for exploit delivery. The ClamAV detection 'Pdf.Exploit.JSCode-1' further confirms its malicious nature. The primary attack vector appears to be exploiting CVE-2009-4324 via JavaScript to achieve code execution.

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` `57b42384050fc17d16309fea86a3438fb96a60a53b31216144540b664ec90daa`	pdf-javascript-stream	PDF /JS object 5 at offset 0x117	1451 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0005_001.js` `01acc3e630221af1b21990637a7ed81920b5e91f9196e67f7503a1b50346110b`	pdf-javascript-stream	PDF /JS object 5 at offset 0x117	39 bytes

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