PDF malware analysis — malicious · 91acafa2777bb794

MALICIOUS

PDF

1.4 KB

MD5: d0ee2eb8a77e39927e9315a2f2e0af7d SHA-1: df25119301b51e7e9dedb885a8851e50fb7dbc0f SHA-256: 91acafa2777bb794bead198077332af94cfa614042b32b39c6690466b0d993fd

118 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious File T1190 Exploit Public-Facing Application

The PDF file contains embedded JavaScript that is obfuscated and uses the unescape() function, indicating malicious intent. The critical heuristic firing for CVE-2009-4324 suggests the sample exploits a vulnerability in Adobe Reader to execute this script. The script is likely designed to download and execute a second-stage payload.

Heuristics 5

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)
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` `2c893b01284cc49bc944e537c72bf3a475debfee5914eb5cfafe9ebd3123ab6a`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1258 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` `d7e8e9afebb18f2979d1be0cbd18d0c81275bf844972e6442618815f5db9a06c`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x486	256 bytes

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