PDF malware analysis — malicious · f03f00d6d6c20d5a

MALICIOUS

PDF

40.0 KB

MD5: e57ff63b086b5a536baa15765be8b6ca SHA-1: 0c3776b11d660cf1e5046132624d90a842d12166 SHA-256: f03f00d6d6c20d5aadd433e8c692a2f9804143da7fb97aeff608c1a0e6a4da5c

228 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file is flagged as malicious by multiple engines, including ClamAV, and exhibits critical heuristic firings for CVE-2009-4324 (media.newPlayer). Embedded JavaScript actions and streams were detected, indicating an attempt to execute code. The deobfuscated JavaScript, legacy_pdfkit_stage_000.js, likely contains the logic for downloading and executing a secondary payload, as is common with this exploit.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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. (identified after JavaScript deobfuscation)
ClamAV: Win.Trojan.Agent-36169 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Agent-36169
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.
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_obj0008_000.js` `528a8f40e18a2b7edf47b4dbcc688c6bcb8419a0c22624b56eac2abd549a69aa`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	2019 bytes
Detection ClamAV: Win.Trojan.Agent-36169 Obfuscation or payload: unlikely
`legacy_pdfkit_stage_000.js` `ecef8c2cfb1478dfd65c9b910d69c5ef07805909a65cc3ddd5c942deecc6f5d4`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x9FE	2540 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `42025b552c7960b53abcd8cd732b01c8d109eccfdfefc352b9826c4d5807d414`	deobfuscated-js	cross-stage annotation API aliases at offset 0x1E7	81 bytes

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