PDF malware analysis — malicious · b9f1f6a83fd80bd5

MALICIOUS

PDF

1.4 KB

MD5: 234969ebb587416607b5a0731999a418 SHA-1: 794a075950401aa58c520338a450ce7cbeabd98e SHA-256: b9f1f6a83fd80bd57203be3a2a06e8d5c0deb1cc0e8ab68e8ff84616bd28a201

118 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File

The PDF file contains embedded JavaScript, which is triggered by a vulnerability (CVE-2009-4324) related to media player handling. The JavaScript is obfuscated, but the presence of the unescape() function and the critical heuristic firing indicate it is designed to execute malicious code. The primary attack vector is the exploitation of this PDF vulnerability to run the embedded script.

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` `ed214d008ca7f8fad0affc792159f2b30ce479dc90c5348e0751937c74ebe0c2`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x197	291 bytes
`javascript_obj111712_001.js` `980a2414cabac479312026d43a0caca1a5faadecc4e9bd1981001f54fe97b6d1`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x2B2	990 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj111713_002.js` `d2f98bec78aa096efa5aca99b701d5e6b9a8e2cf728fb7e79bf248862bacf14b`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x51A	70 bytes

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