PDF malware analysis — malicious · 93dc352f5ad56225

MALICIOUS

PDF

18.5 KB

MD5: bed7ce17e54fde2ab2c4e5c4a7233373 SHA-1: f0ae38a96f7a25ef953128aea5de147f051cfd80 SHA-256: 93dc352f5ad56225207fdd5f7daa94385744c51a6afcf8139011a76ec939eaf6

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file contains heavily obfuscated JavaScript, including multiple eval() and unescape() calls, indicative of exploit code. The critical CVE-2009-4324 heuristic confirms the use of a known vulnerability to trigger the JavaScript execution. The deobfuscated scripts suggest the primary intent is to download and execute a secondary payload, although the exact URL or final payload could not be reconstructed due to the obfuscation.

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` `8ef5aa645cb1951ba82f2403dfa48107177820955950f8b4199084faeaa4d469`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	2804 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` `9276fd8b5cb3f3e9b9493aeb9a22d1103eea8486964849e6a9ea889a47ea6a70`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xCB8	12748 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` `0e6d9eed623ddefcb512053b1a38ba7037336e8a99f45947bc0323ba628b3201`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x3EBA	2827 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).
`legacy_pdfkit_stage_000.js` `14d9d23d619682a659b666d1537fbe47a8cc4db49b0c37d63714847d39b24a42`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xCB8	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` `5091795dc7dfd1e269d30a5ab394f1536cab6157b0cb74b7e26a9fdc9129a46f`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x3EBA	165 bytes
`legacy_pdfkit_stage_002.js` `376cfd6a3f51ed54b8d4ce85d16c3e84d41b9f4c131e27b4ab8715d3f12255e2`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xCB8	1246 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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