PDF malware analysis — malicious · d0805f3b7d53e50f

MALICIOUS

PDF

196.6 KB

MD5: 3acdfb91603b4bcb922c4354b612d837 SHA-1: d6d76c89afd8c2ea9ba0b179be13a159f9e36b06 SHA-256: d0805f3b7d53e50f3f7c3085e82fa23b3221d1650decf2fa0a701c3c7e5f9c7f

136 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 JavaScript

The PDF sample contains embedded JavaScript, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2009_4324 heuristic firing points to the exploitation of a specific vulnerability using the media.newPlayer API, likely to trigger the execution of the obfuscated JavaScript. The unescape() call and obfuscated script indicators further suggest the JavaScript is designed to download and execute a secondary payload. No specific family could be identified.

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. (identified after JavaScript deobfuscation)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
Suspicious extracted artifact medium 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.
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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0008_000.js` `c96845789ac91dbf9379552d4f615c7d16786b56eae5c8d99a3e5fea8bde8001`	pdf-javascript-stream	PDF /JS object 8 at offset 0x210	2960 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 3 long hex-escaped blob(s).
`legacy_pdfkit_stage_000.js` `42c3f4df375ff6f58ff655cc4f88b5cc28f0dd33b978390db3538684a6219b74`	deobfuscated-js	string-concatenation normalized Acrobat API aliases at offset 0x210	126 bytes

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