PDF malware analysis — malicious · 8193d9f71e1bb4ff

MALICIOUS

PDF

2.4 KB

MD5: 24ead172f916de51456a49a336df329e SHA-1: 89f90f3f0906caade416456bc350788f2fedd9c5 SHA-256: 8193d9f71e1bb4ff1cefc9ef3a7afbd94e7113a1122b4559985d2e22a5dd7456

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution: Malicious File T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains obfuscated JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_UNESCAPE. A critical heuristic identifies the CVE-2009-4324 vulnerability related to media.newPlayer, suggesting the embedded script is designed to exploit this flaw. The script likely attempts to download and execute a second-stage payload, although the exact mechanism is obscured. The ClamAV detection further confirms its malicious nature.

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: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `2e7659b0fe86eebe9ae930d873929070eaa8fb98c75a3a51e7827d28e7ad35f2`	pdf-javascript-stream	PDF /JS object 7 at offset 0x201	1250 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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