PDF malware analysis — malicious · 248436555d254c32

MALICIOUS

PDF

6.7 KB

MD5: 4225c4345e067f36687da2766113d57d SHA-1: bef48b41044653ab883aea85d560b6488d151861 SHA-256: 248436555d254c329594f4b29f89ef31ea01b095e22dfde20098c160ecf99ea8

266 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 JavaScript/JScript

The PDF file contains embedded JavaScript that exploits multiple known vulnerabilities (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659). The JavaScript is XOR decoded and then evaluated, indicating an attempt to execute arbitrary code. An extracted artifact was also detected by ClamAV as Js.Exploit.Shellcode-18, further supporting the malicious nature of the embedded script. The exact payload or intent of the script cannot be fully determined due to obfuscation, but it is clearly designed to leverage these vulnerabilities.

Heuristics 8

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)
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.
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0039_000.js` `dfa1d06aa17bc806b690702484d9111ae79f802e57337fc23433d4f2bc7ebe09`	pdf-javascript-stream	PDF /JS object 39 at offset 0x16F	21177 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `d80fbf18a538524687ba090bf14ad3f01057f1d0e56d91873391689b1ed930a6`	deobfuscated-js	numeric array XOR decoded JavaScript at offset 0x16F	5488 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 9 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `fb7e7a5d017875bb9957eaead0af712ef9f86dcca19ac287c65ad8ba2e665743`	deobfuscated-js	numPages XOR decoded JavaScript at offset 0x16F	5488 bytes

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