PDF malware analysis — malicious · cd5962d35adfa2fd

MALICIOUS

PDF

1.4 KB

MD5: 004f4cfcb377fc773fdbbfcb5da6018e SHA-1: e31bbc2dddc384cb06fd41f140f989d8058a1456 SHA-256: cd5962d35adfa2fdd8fb780284d4d5c3cbd9ad32564bc45dbc2deae03079345b

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 the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2009_4324 heuristic firing points to the exploitation of a known vulnerability in Adobe Reader via the media.newPlayer object. The unescape() call suggests obfuscation of the JavaScript payload. The primary intent appears to be the execution of this JavaScript, which is likely designed to download and execute a second-stage payload, leveraging the identified CVE.

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` `e60b915645dbbe8e4c9c15d28c96b71142c349347534349c0047e031783b1a2a`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1267 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` `5875bb20a40829bcade102f5f542d09c520e89c134835d2e1d76ef0ef3007714`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x488	257 bytes

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