PDF malware analysis — malicious · fcbfa718198c648c

MALICIOUS

PDF

1.5 KB

MD5: 8bdc803caf0f659a52caa7b9288e0406 SHA-1: 218edc53c1e4f76f90c214edf02340725959f200 SHA-256: fcbfa718198c648c23fc5ec3e4f9b55a3bd1be36412a90377cbfd5c115b41a34

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, a vulnerability in Adobe Reader related to media playback, which is often leveraged to execute 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111711_000.js` `80d0531cfcfd5f75493ff3aeefeb43b6a7281077b49972807cd2675ac97439ae`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x197	294 bytes
`javascript_obj111712_001.js` `62667adba3ef17dfb8396da5a4bae82a54a770611607497c318b5b7da3f62ac1`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x2B3	1950 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_obj111713_002.js` `27f3b109bc63c59e2a8399ab722d92c7b35227805ca771c1aa8cfa43e62747e6`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x547	79 bytes

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