PDF malware analysis — malicious · 70a1c9698ab2684e

MALICIOUS

PDF

4.0 KB Created: 2008-31-20 53:85:00 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 0c9511f316c986d3284a5b8f831ad1a6 SHA-1: 5eba5774ef9cdfc2a363479f261eb55d2ae42184 SHA-256: 70a1c9698ab2684e2b84e70281d03a5a134d7fe50c3851dae18fd656b7de4ed4

290 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 (media.newPlayer). The script is designed to download and execute a second-stage payload from the URL http://121.101.216.203/aaff/news.php. This indicates a clear intent to compromise the user's system through exploitation and subsequent payload delivery.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 9

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.
PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits
Generic recovered JavaScript exploit stage high PDF_GENERIC_STAGE_RECOVERY

Bounded static stage recovery exposed hidden JavaScript through generic transforms such as null-byte collapse, percent decoding, marker replacement, arithmetic character codes, fromCharCode, numeric arrays, numeric-array minus-key decoders, alphabet-index arrays, /Producer half-difference metadata arrays, hex literals, marker-stripped Base64 literals, custom 6-bit XOR table decoders, or repeated-marker hex carriers. This rule is emitted only when the recovered stage contains exploit-like Acrobat JavaScript or shellcode markers.
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://121.101.216.203/aaff/news.php?dd=OkExQXtfczN4c3RydD8%2BUEZBZTZ1QmVwRldFQzcpei9FMDVGWDhYIktCInFnXW1xQnVhVHUibisyL3NmNzlZTWl2WyJTdVJbbDE7LDY7IlpkXTFzLy95ZWR6LzMiYno9eWw5KTt5biI3SzFaM0Q0S0QyQ3JTd1YiNn19W1BvKyJWIkhTI10qVjMibHopImls

Extracted artifacts 7

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0001_000.js` `e7eb3123ae9ea34dcfa27b22783e97242c24dab312b31f744ef68ded60fb6923`	pdf-javascript-stream	PDF /JS object 1 at offset 0x16	32 bytes
`javascript_obj0013_001.js` `fd3b1f1dddc786f92cd500fe8ea6d89d01036352caea562d32338b6006b528f4`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3A4	2600 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`javascript_obj0013_002.js` `8dd24b5d5ee79f5b51e9964c144f46e99859a22242b0cf9501dc6bb85220ad6d`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3C6	3175 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`generic_stage_recovery_000.js` `4f16c0119d5371fe91fee701bec08189e2bf943e2ebf47929323382fc44f7e62`	deobfuscated-js	generic stage recovery percent-decode from JavaScript object 13 at offset 0x3A4	2598 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`generic_stage_recovery_001.js` `d420b703270fe03e5c6d2858771e5ecc324eaff051d20095c857658e58aa8451`	deobfuscated-js	generic stage recovery percent-decode from JavaScript object 13 at offset 0x3C6	3173 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`generic_stage_recovery_002.js` `fe961354aa8024e9f54c1dc15003e6ce090f0464529831147d4000bc57d0c42c`	deobfuscated-js	generic stage recovery percent-decode from combined JavaScript objects at offset 0x16	5805 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).
`combined_document_js_000.js` `ed6417abda0a96dfee1bd794e8c99f8069cba8bbc5551c9cb53a4bb9accbee1a`	deobfuscated-js	combined document JavaScript streams at offset 0x16	5809 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).

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