PDF malware analysis — malicious · b0f9415c6d0cca39

MALICIOUS

PDF

1.4 KB

MD5: 8b0425c8a2f68e9ee5eb122d2d225d0b SHA-1: 2c4fc3eaf52ab0bc4e7215b3a5b8741c2a6c1b52 SHA-256: b0f9415c6d0cca39fea4898e5c7adbdaf6a444d1529ab182d724526ecce08857

118 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious JavaScript

The PDF file contains multiple embedded JavaScript streams. A critical heuristic firing indicates the exploitation of CVE-2009-4324, which is commonly used to trigger JavaScript execution in vulnerable PDF readers. The embedded JavaScript, particularly in 'javascript_obj111712_001.js', likely contains obfuscated code designed to download and execute a second-stage payload. The presence of 'unescape()' further supports the obfuscation and dynamic loading of malicious content.

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` `98e0408087969dc99da53111b8397e969a0e2bec438ccc72092d0853b665e072`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x2B2	966 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 0x510	70 bytes

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