PDF malware analysis — malicious · a6f23c58059ba7ea

MALICIOUS

PDF

1.5 KB

MD5: 1e6273cb26012ed41d6158e81997eb8c SHA-1: 9e88972b85df6dc79236713a23604731fb381a11 SHA-256: a6f23c58059ba7eab8565e470acd98f9230424236b28d29b5aae21faf1c7a578

118 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF file contains embedded JavaScript, which is a common technique for delivering malicious payloads. The critical heuristic firing for CVE-2009-4324 indicates the exploitation of a known vulnerability in Adobe Reader's media player functionality. The JavaScript stream, particularly 'javascript_obj111712_001.js', likely contains obfuscated code designed to download and execute a secondary payload. The presence of 'unescape()' further suggests an attempt to deobfuscate malicious code.

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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111711_000.js` `32c93bca653f0642f597270e383d135cbf8663836727b20fd2cdaf3902719dca`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x197	211 bytes
`javascript_obj111712_001.js` `5483dfab4f96975aea3ec28ffd2a141258d8bd253fff31e11e15da03e70f5577`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x284	1955 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`javascript_obj111713_002.js` `23163343e0372409aa9b9a12d2e098bbeca255cf6f305c2bf1707506326d2c96`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x51E	150 bytes

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