PDF / .PHP malware analysis — malicious · 034ef0e592881e5d

MALICIOUS

PDF / .PHP

7.3 KB Created: 2009-01-35 62:12:26 Authoring application: Adobe

MD5: 2cf6b501b58ace0c9f137cae9c1eec53 SHA-1: a82cd0408156d3a35f5e21e015c9b877976da1c0 SHA-256: 034ef0e592881e5dd17e15fffe2fda582705e4768dd45732aef8697cc4a2ce60

410 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF sample contains JavaScript that exploits multiple known vulnerabilities (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659) using eval() and unescape() functions. The embedded JavaScript also contains URLs that are likely used to download a second-stage payload. The ML classifier strongly indicates maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 11

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)
Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927

PDF JavaScript calls Collab.getIcon — CVE-2009-0927 is a stack buffer overflow in Adobe Reader triggered by Collab.getIcon() with a crafted argument. Allows arbitrary code execution. (identified after JavaScript deobfuscation)
Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659

PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (identified after JavaScript deobfuscation)
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.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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://91.201.28.53/ztr/load.php?spl=pdf_new
- http://91.201.28.53/ztr/load.php?spl=pdf_pack

Extracted artifacts 8

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0032_000.js` `32fb6c9f124c510dde29379fd2e7533522e139fc0b8336636e657e25bcdfebdb`	pdf-javascript-stream	PDF /JS object 32 at offset 0x414	128 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0034_001.js` `979cf8b4950547e8635d6ad6cd07afd77d5b7755627b3e1b8a225afe9eae1b9a`	pdf-javascript-stream	PDF /JS object 34 at offset 0x4CE	121 bytes
`javascript_obj0036_002.js` `a9529d7f91e055a756d68afc272639c5af99f81921c93ae5c645d4fd63b93f75`	pdf-javascript-stream	PDF /JS object 36 at offset 0xFD	128 bytes
`javascript_obj0038_003.js` `b90f4ffc73172c8adbb3459b79ad4d2ad95ccbe16a4962dbb324d4be8b583a83`	pdf-javascript-stream	PDF /JS object 38 at offset 0xC32	154 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0078_004.js` `0c916ec0c483ee65b60865ce9ece3cecfa9e4d42f5378dce05305bcffe1eac5d`	pdf-javascript-stream	PDF /JS object 78 at offset 0x7C	35 bytes
`legacy_pdfkit_stage_000.js` `7013041898f168f5c15d691517c5055ec6a486ad39c55052f6838c7962711d62`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x5B8	1640 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `f064f023f18c3aac3d1d8d08e2bf92ac280a38a05deb06d6e168e58d5a3a1c30`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xD56	1806 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_002.js` `4318f710eeb77b2a6bbc9ee5fc5d93acaebbef7154580817349c5867cab4bbeb`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x13C8	2950 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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