PDF malware analysis — malicious · d6b175293bda0c8e

MALICIOUS

PDF

17.4 KB

MD5: bafe0da751a6ad4c5ac8c5747b089326 SHA-1: 4b19c2c1272cbd6019f0b7eb433a9ea0d169651b SHA-256: d6b175293bda0c8e19a7fe6149d3de9fd875f44aa53d31b3582cae19be343dcf

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 JavaScript heavily utilizes eval() and unescape() functions, indicating obfuscation. The primary intent appears to be the execution of arbitrary code via the exploit, likely leading to the download and execution of a secondary payload. The reconstructed string fragments like 'v'+'ar '+'R6P57Ct'+' ='+' e'+'v'+'a'+'l' and similar constructs point to the use of JavaScript for exploitation.

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` `3f73b3c7749c52ecbc10b80f52a7450be62aa34a87755bdaaf11e4b0e85278d9`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	2799 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).
`javascript_obj111712_001.js` `65302be851d3a73651ec63be678d86372909219d14ba460d038b33d2b7ad1c52`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xCB3	11947 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` `a6d500a2f083721f5be8c9471fd6329055080cb3b10a1cc48c564c28b9977bf4`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x3B94	2482 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` `27920ea41782e3de7681655436ad162917290e5898d36303bc383088d7d66d85`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xCB3	1075 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` `cd7088aa0ba5ce42db7faac79c4063dccc339c8953139714658e9cb6b07c91fc`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x3B94	165 bytes
`legacy_pdfkit_stage_002.js` `9281d248724141db8c56e3a7a215aeedbcd64dc628102fdae7744b5d2cbfe2b0`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xCB3	1241 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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