PDF malware analysis — malicious · 83be115f52c025eb

MALICIOUS

PDF

3.3 KB

MD5: 9871ff46e6839cd85d2da82cb2527c9c SHA-1: a0af7be3aee06c7527720c6d66ec64ce15d1d279 SHA-256: 83be115f52c025ebfc6e023b216053b9f633340d40bf6a08f8cc92d7a58cc2d5

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 critical CVE_2009_4324 heuristic specifically points to a known vulnerability in PDF media handling. The unescape() function is also used, suggesting obfuscation. The embedded JavaScript is likely responsible for exploiting this vulnerability to download and execute a secondary payload. 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_obj0006_000.js` `e429fdabf71367c6988696413f35aba975f316b0361aabaab25bd9f856ad151a`	pdf-javascript-stream	PDF /JS object 6 at offset 0x18B	2337 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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