PDF / .213 malware analysis — malicious · 2516c0b455fc682f

MALICIOUS

PDF / .213

2.8 KB

MD5: 841db45aa47e31cb6ee2575c2eeb582f SHA-1: e286bad259933696c42302971d09ecdc61adea74 SHA-256: 2516c0b455fc682f131d2f5c79d390c939e0ecb7e7aab288ca8d80fe0c0aec9b

238 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 firing suggests exploitation of a specific vulnerability related to media player functionality. The embedded JavaScript stream, identified as 'javascript_obj0008_001.js', was further flagged by ClamAV as 'Js.Exploit.Shellcode-18', indicating it likely contains shellcode. The unescape() call suggests obfuscation of the JavaScript payload. The overall behavior points to a malicious PDF designed to exploit a vulnerability and execute a secondary payload.

Heuristics 7

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: Js.Exploit.Shellcode-18 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Js.Exploit.Shellcode-18
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
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_obj0008_001.js` `d1b82d21e3f98acb1876d9ad1110a4cb018946f95bcccb58c0c94704118d2e70`	pdf-javascript-stream	PDF /JS object 8 at offset 0x193	5877 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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