PDF malware analysis — malicious · 2fd7dc16ff24e859

MALICIOUS

PDF

10.9 KB Authoring application: Finished the hands of gleaming galactic worlds bored him by.

MD5: 305355649e319f7e6788681bf75743f3 SHA-1: 2555b1dea7e8276663d51cd28095ec429a7ca557 SHA-256: 2fd7dc16ff24e85966e1e07bc95e2ce85d2c663c8040667c4da21b2cd510bad5

496 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell

This PDF file is malicious, exploiting multiple known Adobe Reader vulnerabilities. The primary mechanism involves a JavaScript stager that uses arithmetic and percent-encoding, which is then unescaped and evaluated. This stager is designed to exploit CVE-2009-4324, CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992, likely to download and execute a secondary payload. The ClamAV signature 'Pdf.Exploit.Agent-35646' further confirms its malicious nature.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 12

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)
util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992

PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (identified after JavaScript deobfuscation)
Multi-CVE Adobe Reader JavaScript exploit kit critical PDF_ADOBE_READER_MULTI_CVE_JS_KIT

One recovered JavaScript stage contains multiple version-gated Adobe Reader exploit branches. This is stronger evidence than independent API keywords: the PDF is selecting old Reader vulnerabilities by viewer version and running heap-sprayed Acrobat JavaScript exploit paths.
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
Arithmetic percent-encoded JavaScript stager high PDF_ARITHMETIC_PERCENT_JS_STAGER

PDF JavaScript stores the hidden stage as many float*4 character code tokens separated by #, rebuilds a percent-encoded script with String.fromCharCode, then unescape/evals the recovered JavaScript. The decoder is gated on metadata-access launchers and requires recovered exploit-like Acrobat JavaScript.
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0018_000.js` `d9063643d0becfa8245613ea4bd909f8b7a7c106aa0e68b4c36ca7ca2edc850c`	pdf-javascript-stream	PDF /JS object 18 at offset 0x4BA	162732 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`arithmetic_percent_stage_000.js` `36898a119ea2a10ac9d01e4d35c40be2b3975cf5e4938c89d0d44ab5ac5058f4`	deobfuscated-js	arithmetic-percent decoded JavaScript object 18 at offset 0x4BA	7672 bytes
Detection ClamAV: Pdf.Exploit.Agent-35646 Obfuscation or payload: likely Carved artifact contains 12 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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