PDF malware analysis — malicious · 9a8991f97ee00307

MALICIOUS

PDF

1.4 KB

MD5: bd028b8d814a2d316457daeb63aab6fd SHA-1: fee7b631aca8667d3835a4b355094874b0759022 SHA-256: 9a8991f97ee00307cee1150b7e27e88ad596db5d5b37c4ae888c256f2ed2afd1

118 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File

This PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2009_4324 heuristic firing suggests the file exploits a vulnerability in the media player functionality of older PDF readers. The PDF_UNESCAPE heuristic further points to obfuscated JavaScript code. The embedded JavaScript is likely designed to download and execute a second-stage payload, a common technique for initial access.

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` `04f2dd1b08884b5ecb3aca7fa1919df802a09b2bc7a64cc45c3e34adb316adb9`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1276 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` `2f9905104c3e4647e85c3982157d346710207a8e7ec6bdc1c678415d38f7cc0b`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x48B	269 bytes

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