PDF malware analysis — malicious · 0226bf53594c8ebd

MALICIOUS

PDF

21.5 KB

MD5: 1baa3cda95e4cfec9ae002f6340ca545 SHA-1: 0b3e61eb21b7e15ff758d9f75d0e3d6dd93a188d SHA-256: 0226bf53594c8ebdc677d25c1b1337d6aa64eea4539235e722c282cc70bb7684

150 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. This JavaScript is designed to download and execute a second-stage payload from the URL http://anilistico.co.in/new/post.php?e=8&&. The ML classifier strongly indicates maliciousness, and the critical heuristic confirms the exploit trigger.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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. (identified after JavaScript deobfuscation)
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://anilistico.co.in/new/post.php?e=8&&

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0008_000.js` `d179d7e79dad9c3270176c96ba0e4de52f054c6dcde47d055ed2e3d4e5ce69f9`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	2221 bytes
`javascript_obj0008_001.js` `9f6b49a33725f8b72b29aab5eb67313a0b491be1474d6c2a7831e18db7274c52`	pdf-javascript-stream	PDF /JS object 8 at offset 0x209	21459 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_000.js` `630bbd87d4c991442612bbfc5d0e64a58d98100212c3f8e897f80b45684ffd16`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xAC8	1262 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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