PDF malware analysis — malicious · f320b81e9437d3f0

MALICIOUS

PDF

2.1 KB

MD5: 341dffca1b50df08d346e6be14db6803 SHA-1: bd1657a5139c528f0d8bccd61b9c409505d88f2c SHA-256: f320b81e9437d3f005ac9001327d3f11f6dad56793249d7e885f29bf906f8e38

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF document 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. The JavaScript itself appears obfuscated, using a spray_heap function and unescape calls, suggesting an attempt to download and execute a second-stage payload. The presence of these elements strongly points towards a malicious PDF designed to exploit a known vulnerability.

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.
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` `3401ed7cb1ee1d2604410a3e1bbfd52470a5636d089e36b78ae64c55a17f4f61`	pdf-javascript-stream	PDF /JS object 5 at offset 0x124	1638 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0005_001.js` `66b0e774d674fcf97f0a730404863c25d04e72e02edcf7e6c2a4581b1295b317`	pdf-javascript-stream	PDF /JS object 5 at offset 0x124	40 bytes

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