PDF malware analysis — malicious · efe0672b79de79b7

MALICIOUS

PDF

2.5 KB

MD5: f69fe0a14a4a0dddd14c9cfdfb091a2f SHA-1: acc9e06aa53bd8f0bf286273416fbf96a2de4909 SHA-256: efe0672b79de79b7e41ece253a299a7f9217f748f232a9453dec9dadbc31d675

118 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious Link: Malicious File T1059.001 Command and Scripting Interpreter: PowerShell T1059.003 Command and Scripting Interpreter: Windows Command Shell T1059.007 Command and Scripting Interpreter: JavaScript/TypeScript

The PDF file contains embedded JavaScript that utilizes the `unescape()` function and exploits CVE-2009-4324 via the `media.newPlayer` object. This indicates the sample is designed to leverage a known vulnerability to execute arbitrary code. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, although the specific details are obfuscated. The presence of JavaScript actions and streams, along with the critical CVE-2009-4324 firing, strongly suggests a malicious intent.

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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0005_000.js` `1fd745c61b3d75357cd4b4696aca5a26df8fb3970696bb88da589a544da432fe`	pdf-javascript-stream	PDF /JS object 5 at offset 0x10A	2076 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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