PDF malware analysis — malicious · d78d4b61e1696870

MALICIOUS

PDF

1.4 KB

MD5: a35941a41a15d34192666eac7ec3a162 SHA-1: 6990820fbdc2b87c196fe40ac5678cd5b0d63bae SHA-256: d78d4b61e1696870f35f0049118a997e39249ac23a2f9f5d4ed8b8b7f2c3eee0

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious JavaScript

The PDF file contains embedded JavaScript, which is triggered by the 'media.newPlayer' object, indicating exploitation of CVE-2009-4324. The JavaScript is obfuscated and uses unescape() for decoding, suggesting it's designed to download and execute a second-stage payload. The presence of multiple JavaScript streams and the critical heuristic firing for CVE-2009-4324 strongly indicate a malicious intent to exploit this vulnerability.

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` `faa8a99a8341d4b82fc1fac8a440289e73de6cae24e59fad895d389d7c846be0`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1266 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` `0431a66b6f810ff9ad10a9b815377175fb99bc3462d48828c926af967fabe9a2`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x48A	251 bytes

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