PDF malware analysis — malicious · a755a2bb7b5361b2

MALICIOUS

PDF

1.4 KB

MD5: 61cdfe8d30dde044cc7cb440f0dbdcc1 SHA-1: 2d1fa6274b98de03e98a94846dc8d24f07d35391 SHA-256: a755a2bb7b5361b2972048f736e0e9adf446cfca78251a14a7022bcc6c41a4a1

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.001 Malicious Link T1204.002 Malicious File

The PDF file contains embedded JavaScript that is triggered by opening the document. The critical heuristic firing for CVE-2009-4324 indicates exploitation of a known vulnerability in Adobe Reader via the media.newPlayer object. The JavaScript is obfuscated, but the presence of unescape() calls and the overall structure suggest it's designed to download and execute a second-stage payload. The extracted file 'javascript_obj111111_000.js' is likely part of this malicious chain.

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` `b2cbf1d005532c015c91eb782a9f458c3fba66e73c603e4561fe86ccdbf6a3f0`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1286 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` `a70e8707617a66c5468245ededb797b8c4f4219a90130a16ea0a085219f41110`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x493	271 bytes

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