PDF malware analysis — malicious · 84aa0ee9fec6405f

MALICIOUS

PDF

21.4 KB

MD5: 1c375bf31210cfdfbc1de4c84bc286c9 SHA-1: 4e58591529d41453524264311f35d14ee69cae52 SHA-256: 84aa0ee9fec6405f5cba95aa4353b74ee00092fde827662da93ccda9462c643b

210 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains embedded JavaScript that exploits CVE-2009-4324 via the media.newPlayer annotation. The JavaScript is designed to download a second-stage payload from the URL http://ialnd.in/and/p.php?e=8&&. This indicates a clear intent to execute arbitrary code from a remote source.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 7

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. (identified after JavaScript deobfuscation)
ClamAV: Pdf.Exploit.Agent-20224 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-20224
PDF JavaScript shellcode contains an embedded download URL high PDF_JS_SHELLCODE_DOWNLOAD_URL

Decoded PDF JavaScript shellcode contains a hardcoded http(s) URL stored as little-endian %uXXXX Unicode escapes. Reader exploit shellcode embeds the second-stage fetch URL this way and pulls it down with a urlmon/URLDownloadToFile-style download-and-execute (commodity downloader behaviour rather than a specific Acrobat CVE).
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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://ialnd.in/and/p.php?e=8&&

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0008_000.js` `0280571df46818db65899f020e06ba7ff22b0af6496610a273fa17fba77b9de3`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	2553 bytes
`javascript_obj0008_001.js` `0f0205f6004f1da05516ab1332ff81711f7ab004c666c536d71ba5b27d004c46`	pdf-javascript-stream	PDF /JS object 8 at offset 0x209	21431 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_000.js` `13c63370f9c03c2ce2cebb3758bb62aea4985216fbc68582a92677387a754af2`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xC14	1238 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `42025b552c7960b53abcd8cd732b01c8d109eccfdfefc352b9826c4d5807d414`	deobfuscated-js	cross-stage annotation API aliases at offset 0x1E7	81 bytes

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