PDF malware analysis — malicious · 51eabed8da0934b4

MALICIOUS

PDF

18.5 KB

MD5: cf4e32e3e409a1d8bf08e78f440afdad SHA-1: 3aaa5245affa80a0ba26f304f4984fe97804068b SHA-256: 51eabed8da0934b462815e0af74b677d856f94b5ccb3753f1f5c963c7cb9166a

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF sample contains multiple embedded JavaScript streams, with a critical heuristic firing for CVE-2009-4324 related to media.newPlayer. The document body reveals obfuscated JavaScript code that utilizes eval() and unescape() functions, indicating an attempt to execute arbitrary code. This script likely downloads and executes a second-stage payload, a common technique for initial access.

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` `651fe34409313199e8cd5b3e5dc9fae1cef58df993954a03f600d79d82b3c16b`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	2642 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_obj111712_001.js` `94d90616da5233dd7c630f2946e37d6588f3beb23a36455587201477ed8dd43e`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xC16	13439 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_obj111713_002.js` `ebfc042eef6b3de998ba0b158b953ca3a1703d41fda324ce808864dc13b9c5d6`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x40CB	2244 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).
`legacy_pdfkit_stage_000.js` `14d9d23d619682a659b666d1537fbe47a8cc4db49b0c37d63714847d39b24a42`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xC16	1080 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` `11deac0c8c4fddf639cd08af03d111dd60cc5bb02fc11bff3372efa18bbf175f`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x40CB	168 bytes
`legacy_pdfkit_stage_002.js` `06809eb4700d5571a0beec1f80e8739d8425d77fd49c2367b89d7decd9373bf1`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xC16	1249 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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