PDF malware analysis — malicious · eb8264674fd2390c

MALICIOUS

PDF

1.4 KB

MD5: b36a9e52214f31b7f75c8d68e3dc4477 SHA-1: f3e8b93ea4b0c9fe261282ba958dfcc78f9de562 SHA-256: eb8264674fd2390c4e0016c599dd9c181853ab9019f1113165f2c7cf22dcc5ee

118 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. A critical finding is the exploitation of CVE-2009-4324 via the media.newPlayer object, which is a known vulnerability for arbitrary code execution. The JavaScript is obfuscated using unescape(), a common technique to hide malicious code. The primary intent appears to be the execution of this JavaScript, which likely downloads and executes a second-stage payload, a common pattern for PDF-based malware delivery.

Heuristics 5

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)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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_obj111111_000.js` `ae7bbccec7e15ba92aaa3cfcac1be3abda411fea1c75e9a81d92d391cedca2ba`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1265 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` `ad603bea2cbbb4fd0def5b6946ac599bf7805fa7fe7214bb7af1f1159e1c26a1`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x489	253 bytes

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