PDF malware analysis — malicious · 339b2cb8eabef2a0

MALICIOUS

PDF

1.4 KB

MD5: 1b872f464ff20dc1a6d532ec0824512b SHA-1: 476ff06414936dcaede10e9bcf046c3835399fca SHA-256: 339b2cb8eabef2a0869e0e86999ac8ce9aa7adc0332be94e6a8f0bf9161a5d63

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell

The PDF file contains embedded JavaScript, which is obfuscated and utilizes the unescape() function. The critical heuristic firing for CVE-2009-4324 indicates the exploitation of a vulnerability related to media player objects. This suggests the document is designed to deliver a malicious payload via JavaScript execution, likely leveraging the identified CVE. No specific family could be identified, but the attack pattern is consistent with PDF-based exploit delivery.

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.Exploit.Agent-20116 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-20116
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 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` `cca61ee9492b693acba6070189b39add0d61da5df1d27b27b02c14ba041b0e15`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x2B2	960 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 0x50F	70 bytes

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