PDF malware analysis — malicious · 8945a2e9581f166f

MALICIOUS

PDF

1.4 KB

MD5: 100780b6af5ac718c7ee11585f3da2a2 SHA-1: 26847177389e1d601a8a2d38bbef0e00565b859d SHA-256: 8945a2e9581f166f46c1905e5de684a1bfcd7ce28bf4b26f8d17833daa4d0ad5

118 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

The PDF file contains embedded JavaScript that is obfuscated and uses the unescape function. A critical heuristic firing indicates the exploitation of CVE-2009-4324 via the media.newPlayer object, which is commonly used to deliver malicious JavaScript payloads. The JavaScript is likely designed to download and execute a second-stage 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` `c67a35ad6924ef6100fa773cca9943ca8df4352bc514078529ce5c653d20ced7`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1246 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` `571569fb9d96257455d39bd6201a694c5f10f261fd3ba939c71e5c61ce86f065`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x480	245 bytes

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