PDF malware analysis — malicious · 25a1fd5d149d5a50

MALICIOUS

PDF

1.5 KB

MD5: e263c0c76af473ea43a1cd8f0fb6f6c2 SHA-1: f7430c581306408fad4f077dd4c7fc3932509e6d SHA-256: 25a1fd5d149d5a50bfb77158706e685380dde57d00d47605402b166d94bee2ab

118 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2009_4324 heuristic firing suggests exploitation of a known vulnerability in PDF readers. The unescape() call and the presence of obfuscated JavaScript streams further support the execution of malicious code. The likely intent is to download and execute a second-stage payload, as suggested by the suspicious extracted artifact.

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 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` `faff4f140ca939cbc99fd4fdbae40815a0f666f83a58847199dbd837eafb35f8`	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 0x54E	79 bytes

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