PDF malware analysis — malicious · 1bdf52fbb0db5d1c

MALICIOUS

PDF

1.4 KB

MD5: 43264d5d2cda47c335eb3dd7c51175f5 SHA-1: 2c5310fd569e109e8ec3cb23c5d0bd9447d3f0f2 SHA-256: 1bdf52fbb0db5d1cb49620c91bbbb2fcb31dfbe8f14336082fa35f05883978f3

118 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution: Malicious File T1059.007 Command and Scripting Interpreter: JavaScript

The PDF file contains embedded JavaScript, which is triggered by a vulnerability (CVE-2009-4324) related to the media.newPlayer object. The JavaScript is obfuscated and likely intended to download and execute a second-stage payload. The presence of multiple JavaScript streams and the unescape() function 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` `323a43983d4aaf81607a11c4cbda76d65d1025f43f5d8b08e67e74c9703eec91`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1209 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`javascript_obj111112_001.js` `8e91781f2f00f52b1dae2af3b0b6833a11f7f97cc892c29a14aecfec7818f2e9`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x470	273 bytes

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