PDF malware analysis — malicious · 60bb483be19410f1

MALICIOUS

PDF

51.2 KB

MD5: 683120b21057cc6d8c42fb9ec09301fe SHA-1: 28e014c2bc36d2adcf1758eca8203ac019672b46 SHA-256: 60bb483be19410f1f7ebf6ee56ebb9e66a426c51269d0a2ce61a20e2a2e09a09

252 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains embedded JavaScript that exploits CVE-2009-4324, specifically targeting the 'media.newPlayer' functionality. The JavaScript is heavily obfuscated and appears to be a downloader or exploit stage, indicated by the 'generic stage recovery' heuristic. The primary goal is to execute arbitrary code via the exploit.

Machine Learning

Nyx PDF Classifier malicious score 0.9994

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. (matched in decompressed stream)
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 (matched inside decoded stream)
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.
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.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://ns.adobe.com/xap/1.0/
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/pdf/1.3/

Extracted artifacts 10

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0057_000.js` `eae10c2d1846ed108dbd322fa8001738199732b4fe8b3355e360a1f3532eb5fd`	pdf-javascript-stream	PDF /JS object 57 at offset 0x551F	2102 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`stream_005_off00000b74.bin` `e4217c167299ac63f64b8b7e903cc0196f0828693d273431b8b793a12ed0fed3`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xB74	1000 bytes
`generic_stage_recovery_000.js` `b93e8ecdf0788df91556b0fbf10c3e0d25f9728455da3a58133cd8dd2ff231ec`	deobfuscated-js	generic stage recovery split-literal-normalize from JavaScript object 57 at offset 0x551F	2099 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`generic_stage_recovery_001.js` `baa9e2c3862a7c99c7c545f4aea2ffda085566084afc904dc097ec99e78103f0`	deobfuscated-js	generic stage recovery percent-decode from JavaScript object 57 at offset 0x551F	2098 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`generic_stage_recovery_002.js` `6d7bd4a28343765f1a9af16b92e3902188564512a1e8a50df6c699f1af8d2c52`	deobfuscated-js	generic stage recovery marker-XX-to-%u from JavaScript object 57 at offset 0x551F	1788 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`generic_stage_recovery_003.js` `71fe503a96798dac812f6388728918a3fcdd0ce1abeea34bbe81fa4a153ba77a`	deobfuscated-js	generic stage recovery percent-decode from JavaScript object 57 at offset 0x551F	1784 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`generic_stage_recovery_004.js` `8791ba85121d7081f904c2e03c71c3403f45306ee69748bd581b9c6bc77898d3`	deobfuscated-js	generic stage recovery split-literal-normalize -> percent-decode from JavaScript object 57 at offset 0x551F	2095 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`generic_stage_recovery_005.js` `3f4144e71a12a073af4d0726cd63c0d7d6767839057693c02b2f0f5594ba341b`	deobfuscated-js	generic stage recovery split-literal-normalize -> marker-XX-to-%u from JavaScript object 57 at offset 0x551F	1785 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`generic_stage_recovery_006.js` `03dc9d848c40bd19d32af29ef00174f71f1df723e153060b1a8e0befe2b6370b`	deobfuscated-js	generic stage recovery split-literal-normalize -> percent-decode from JavaScript object 57 at offset 0x551F	1781 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`objstm_0053_00.bin` `f9797d0fa28384c30d8bf1da89163104ce539753e417fa1f9c5fd135d1eceb39`	pdf-objstm-decoded	PDF /ObjStm 53 0 obj (inflated)	50 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.