PDF malware analysis — malicious · 4541c39e7eddb07a

MALICIOUS

PDF

1.4 KB

MD5: 446f2c2010b3d3c5cbe09bfc47b4eb24 SHA-1: c271af1965216e5c7ede3fa7867fb56057372c93 SHA-256: 4541c39e7eddb07a0a54093ab8c8ea0a3e3d70a917617028b1f2386cd02e1efa

196 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell

The file is a PDF that contains embedded JavaScript, as indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The critical CVE_2009_4324 firing suggests exploitation of a known vulnerability in PDF readers. The PDF_UNESCAPE firing points to obfuscated JavaScript. The ClamAV detection further confirms its malicious nature. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, a common dropper behavior.

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-7256015-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7256015-0
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111711_000.js` `ed214d008ca7f8fad0affc792159f2b30ce479dc90c5348e0751937c74ebe0c2`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x197	291 bytes
`javascript_obj111712_001.js` `44ba386a076725c5ab623dadfe4e71a9a3bfdde03c1b9f4e9a555f8f0897c2d8`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x2B2	972 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj111713_002.js` `d2f98bec78aa096efa5aca99b701d5e6b9a8e2cf728fb7e79bf248862bacf14b`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x510	70 bytes

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