PDF malware analysis — malicious · dcd5f0f8c7ba0605

MALICIOUS

PDF

17.0 KB

MD5: 1ac2d4511f8bb50cd9f2899674e4d84a SHA-1: 37ea9c22d4eee88a9cf793017b86946ebe4044ef SHA-256: dcd5f0f8c7ba0605ebe1fc35eda263ba896a3d2fbb0a4d9ffabf8a589b04496b

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file contains embedded JavaScript that utilizes eval() and unescape() functions, indicating an attempt to obfuscate malicious code. The critical heuristic firing for CVE-2009-4324 confirms the exploitation of a known vulnerability in Adobe Reader. The deobfuscated JavaScript suggests the execution of a second-stage payload, likely downloaded from a remote source, which is a common technique for malware delivery.

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. (identified after JavaScript deobfuscation)
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111711_000.js` `417e7a8de5c0fb7bfdb062b23d5aefaea02418fa4c38aed0209a93e55ab6ff8a`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3066 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).
`javascript_obj111712_001.js` `001ef99c43c5793b72f4eb74f95804591d99c82693d026544250452e66767ef6`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xDBE	11626 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 6 long base64-like blob(s).
`javascript_obj111713_002.js` `74e0b3271f31f06533ae6a63210b8355423dbbb0c2d6dae3274cb19001d300f9`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x3B5E	2176 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 4 long base64-like blob(s).
`legacy_pdfkit_stage_000.js` `548797f977e8dc158053ed013e86e59d6d6267cd85840a65686a3ebf50613964`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xDBE	1086 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `fa44c3a6a5df9dd0c4918db03b8a33dc1e24bba8204a13d66510a81c2b2e6f17`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x3B5E	166 bytes
`legacy_pdfkit_stage_002.js` `beb357877d35d10a14bbe047707209e0cb05fe16450a62bfdcf2bee2aaf86792`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xDBE	1253 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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