PDF malware analysis — malicious · cfc916a8f37d96bd

MALICIOUS

PDF

1.4 KB

MD5: bee91526f9467268e1b9b944e01a114a SHA-1: f29dedc7bf365ef23bfa606576314cfee1391d69 SHA-256: cfc916a8f37d96bd42d1684a94b0f7dc62b6fc5cacf1812591988ba1318a321a

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious JavaScript

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The critical CVE_2009_4324 heuristic firing points to the exploitation of a known vulnerability in Adobe Reader via the media.newPlayer object. The unescape() function is used, suggesting obfuscation of the JavaScript payload. The likely intent is to download and execute a secondary payload, leveraging the identified exploit.

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` `f6c10c9343b3d80ba2267cbfb930e496f51793b06f65cc8ed1862c8c09b4a7b9`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1208 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_obj111112_001.js` `aa40ce316d3162cb5b61e17019f929c1c2498bbd5210379bcc5f051bb0d15ff5`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x469	254 bytes

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