PDF malware analysis — malicious · a2d4dd2c0baecbc7

MALICIOUS

PDF

1.4 KB

MD5: 829bffeffd3ccb12020ddd42db51c2f1 SHA-1: a25b8c113962d980be07c4164b2e06fd864ac6c7 SHA-256: a2d4dd2c0baecbc74b321dc7818746c62075567f66ec69c1e8810a6358efb57c

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The unescape() call and the critical CVE-2009_4324 firing suggest exploitation of a known vulnerability in PDF readers. The ClamAV detection as Pdf.Dropper.Agent-7288907-0 further confirms its malicious nature. The embedded JavaScript is likely responsible for downloading and executing a secondary payload, a common dropper behavior.

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-7288907-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7288907-0
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` `1d4069d39e623bd52f94e9e3639728bde57644ba6daa7a88461efdad7f42d0d7`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1287 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` `4af510dfa8233bd0889fcc515a39ae7a47161b6d79fa19550c28715eddae0e32`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x494	265 bytes

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