PDF malware analysis — malicious · 3157ddaef9fdde9b

MALICIOUS

PDF

1.4 KB

MD5: cbb1ed0415f3e791fbd78eeb666d95bb SHA-1: f98cbb72f302973618bd36b1fd9c8564087657c6 SHA-256: 3157ddaef9fdde9b7bc0d6040b527b03cd94bbe9cfb42f0b608a3cfbc5e9be71

118 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

The PDF file contains embedded JavaScript, which is triggered by the CVE-2009-4324 vulnerability related to media.newPlayer. The JavaScript is obfuscated and likely intended to download and execute a second-stage payload. The presence of the unescape() function and the suspicious extracted artifact further indicate malicious intent.

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` `ffd050abe49e085de97a2f1d4a7398aefbe8dc9a40846da8bdaca1d72389573d`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1262 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` `091c5a0300c2c994d76d61e1e0f5d3a459cded20059ddaa275bd76179bf40a50`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x489	258 bytes

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