PDF malware analysis — malicious · e2b1f15ce0430e9d

MALICIOUS

PDF

1.4 KB

MD5: 8aa8f8a79ee4f6195cc31c36e0409468 SHA-1: 935d6c36f02333274bfdcc523167ea6ca311faa5 SHA-256: e2b1f15ce0430e9de151036c7f5220c0aeae431d2744031586c873dac27f9897

118 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains embedded JavaScript that is obfuscated and uses the unescape function. The critical heuristic firing indicates exploitation of CVE-2009-4324 via the media.newPlayer object, which is a known method for executing arbitrary code. The JavaScript is likely responsible for downloading and executing a second-stage payload.

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` `f19b5c1dc355f69d8441770f7120f56619d8040c3af279afd712f0735cdf2f74`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1275 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`javascript_obj111112_001.js` `649791d97e809a5521de7875e0188bfcb46202941e6ce16c2a6a3fe90932fb32`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x489	271 bytes

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