PDF malware analysis — malicious · dd415a964cd41e04

MALICIOUS

PDF

1.4 KB

MD5: 1d7e963675da25e18bac68204a5726c8 SHA-1: 816882500d84531110132d48af3b692501300a55 SHA-256: dd415a964cd41e043f53f2e3e4d0abe10977ed6ddea4a563919ebad6bfd46157

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2009_4324 heuristic suggests exploitation of a vulnerability related to media.newPlayer. The ML classifier strongly flags this PDF as malicious. The embedded JavaScript, particularly the use of unescape() and the ML_NYX_PDF_MALICIOUS firing, points towards the execution of malicious code, likely to download and execute a second-stage payload. The specific vulnerability CVE-2009-4324 is a key indicator of the attack vector.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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` `ff2511ec852422572ad30f02014fe54c7d8b26dd8d98db74acd0fa98bc04155e`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1258 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` `47f978666b9037795d001454703e5aed6b988ad7707e07405864e42acba022b3`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x487	256 bytes

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