PDF malware analysis — malicious · 22d2de84eb3349c1

MALICIOUS

PDF

1.4 KB

MD5: 506d5fdcaa8cc7ba8a8a72a3e10a445b SHA-1: fdd3e2e8ab68620ae20f1251cdf564c40a68a5d6 SHA-256: 22d2de84eb3349c13e85d76a5c5f8d0d8033ea73adf76f1557af89b3fc05bcdb

196 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The critical CVE_2009_4324 heuristic suggests exploitation of a vulnerability related to media player objects. The presence of unescaped JavaScript and a suspicious extracted artifact points towards the execution of malicious code. The embedded JavaScript streams, named javascript_obj111111_000.js and javascript_obj111112_001.js, are likely responsible for downloading and executing a secondary payload, a common technique for PDF-based malware.

Heuristics 6

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)
ClamAV: Pdf.Dropper.Agent-7239118-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7239118-0
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_obj111111_000.js` `642fbc5ab240193316ab4bd089315457eae2d29329d0f7720d057292b1fd59ee`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1192 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_obj111112_001.js` `db36cfc73caf2504b3183d80a76622dba216c0c2ddce0e0b810c54c9c5e754e7`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x467	258 bytes

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