PDF malware analysis — malicious · 9426ee9819d7c6b2

MALICIOUS

PDF

1.5 KB

MD5: 3c2f8d45811a543592677d532ab97053 SHA-1: bd0a2ee9f647e591f70a307e7374c2de5536f203 SHA-256: 9426ee9819d7c6b2602810e16f2bba7b9c0b5788155bf7d1e0c360a2e848e7a6

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The critical CVE_2009_4324 firing suggests exploitation of a media player vulnerability. The embedded JavaScript, particularly 'javascript_obj111712_001.js', is likely responsible for downloading and executing a second-stage payload, as suggested by the 'Suspicious extracted artifact' heuristic which noted script obfuscation indicators. The unescape() call further supports the obfuscation and dynamic execution of malicious code.

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)
Suspicious extracted artifact medium 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.
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.

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111711_000.js` `80d0531cfcfd5f75493ff3aeefeb43b6a7281077b49972807cd2675ac97439ae`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x197	294 bytes
`javascript_obj111712_001.js` `1917a68a382e30ea71acb56ed1d5575a2972b8602d53e14a2988e59ff57f82d2`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x2B3	1978 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`javascript_obj111713_002.js` `27f3b109bc63c59e2a8399ab722d92c7b35227805ca771c1aa8cfa43e62747e6`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x54C	79 bytes

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