PDF malware analysis — malicious · a50285bc354d5883

MALICIOUS

PDF

1.4 KB

MD5: 64288ef49168f894133e51e1c3fe809e SHA-1: c650e38e672b87109455c650502dda42a92ba4e2 SHA-256: a50285bc354d5883813595a3fca7db1db288ea792f4892ee304c8a1c99fcf506

196 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment

This PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The critical CVE_2009_4324 heuristic suggests exploitation of a specific vulnerability related to media player objects. The embedded JavaScript, particularly the use of unescape() and the presence of obfuscated scripts, strongly suggests it's designed to download and execute a secondary payload. The ClamAV detection further confirms its malicious nature as Pdf.Dropper.Agent-7289619-0.

Heuristics 6

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)
ClamAV: Pdf.Dropper.Agent-7289619-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7289619-0
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
Suspicious extracted artifact medium 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.
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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111111_000.js` `aaf627007daa6d80e1492aef76f70b464cf86e8696df55f86930a706459ecf05`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1275 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` `81df9b55c4533248c2eb39473a061c32ebf2d1b59500b171b4994af8fe07ef91`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x490	255 bytes

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