PDF malware analysis — malicious · 923a7697aff4b9bf

MALICIOUS

PDF

1.4 KB

MD5: ee036b10d66f5242930f327bed0ee81e SHA-1: 00eb71258194556b9de0073ce6a114186977e970 SHA-256: 923a7697aff4b9bf47fedc1e37fcdcc817465bfae95ea0558ada5ebdd3020bc7

118 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution: Malicious File T1059.007 Command and Scripting Interpreter: JavaScript

The PDF file contains embedded JavaScript, which is triggered by a CVE-2009-4324 exploit targeting the media.newPlayer functionality. The JavaScript is obfuscated and uses unescape() calls, indicating an attempt to hide malicious code. The primary intent appears to be the execution of arbitrary code via the exploit, likely to download and run a secondary payload.

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` `caf54d079dbf03f88b25231812aa52f38a30d9de4477222cb18bca4ac96be334`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1274 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` `426be1230587157b43df4d37f360e2f84d0d8bb3dc7db62fea89162f67c022fe`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x490	260 bytes

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