PDF malware analysis — malicious · 9851c45ef036e05f

MALICIOUS

PDF

1.4 KB

MD5: c6e7f6a7766811f9af1be3e0d94f8efc SHA-1: cfcd8858854ee2d743bf07b8f790e1159af33c1b SHA-256: 9851c45ef036e05ff712987a212f373848eb34437fd890d1bcffe988c7980cac

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 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 firing suggests exploitation of a media player vulnerability. The presence of unescaped JavaScript and the ClamAV detection as Pdf.Dropper.Agent-7285078-0 strongly indicate that this PDF is designed to drop and execute a malicious payload. The exact nature of the payload is not discernible from the provided evidence, but the overall pattern is consistent with a malware dropper.

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-7285078-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7285078-0
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` `48942b12ef1f6da2c2b79c8487ebf4042a0e888f8bea024f25b563f1bb30b986`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1238 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` `96e2e710e5f3401c3a8d2fb9dc3773e5685b28550344dd661e96f2bcbb19f14a`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x482	257 bytes

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