PDF malware analysis — malicious · 3b99f1a7cfe4b3a6

MALICIOUS

PDF

3.5 KB Authoring application: hXr (via va)

MD5: eff2fba890ae73dbc8db7be3f333aea9 SHA-1: feed0c09e596fcddae6ef8616278fb30e5e1c250 SHA-256: 3b99f1a7cfe4b3a6d28d47cd7b1f55a2ce82d49a2106effc33998d9f79bf5165

280 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.001 Malicious Link: Malicious Link T1059 Command and Scripting Interpreter T1059.001 Command and Scripting Interpreter: PowerShell T1059.007 Command and Scripting Interpreter: JavaScript/JScript

The PDF file contains XFA (XML Forms Architecture) which is known to be vulnerable to several Adobe Reader exploits. The critical heuristics indicate that the embedded XFA script decodes a hex string and evaluates it, likely to exploit CVE-2009-4324, CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. This script is designed to download and execute a second-stage payload from the embedded file 'embedded_file_obj0004.bin'.

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)
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)
Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD

PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
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
`embedded_file_obj0004.bin` `4831d14cc60291be8ffcf3c7d9f06019f01ce0bb153096ea1bb58af6097206f5`	pdf-embedded-file	PDF EmbeddedFile object 4 at offset 0xD8	11239 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`xfa_hex_stage_000.js` `9f9381ba931bc350ed361c538c776c56b5e4be8ce29145ff8e6d15e24a350363`	deobfuscated-js	XFA hex-decoded JavaScript (decompressed, direct) at offset 0x63F	4813 bytes
Detection ClamAV: No threats found 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.