PDF malware analysis — malicious · a4b64b1a1f5ae07a

MALICIOUS

PDF

3.5 KB Authoring application: rxode (via va)

MD5: 63d7e6c5a55e62df843d115f2de44731 SHA-1: 04d714be7cd04156ae376e04eeecb699c221f51f SHA-256: a4b64b1a1f5ae07a96799949a5b2fa7a90fbbfc75e900839ec6493129f5d9d92

316 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution T1059.001 Command and Scripting Interpreter: JavaScript T1059.007 Command and Scripting Interpreter: JavaScript

The PDF document contains XFA (XML Forms Architecture) which is known to be a vector for exploiting Adobe Reader vulnerabilities. Critical heuristics indicate the presence of hex-decoded JavaScript within the XFA streams, specifically targeting CVE-2009-4324, CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. This script is designed to exploit these vulnerabilities, likely leading to the execution of a second-stage payload from the embedded file. The embedded file and deobfuscated JavaScript are strong indicators of a malicious exploit delivery mechanism.

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)
Suspicious extracted artifact high 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 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0004.bin` `930814163ff1fcb529f4807eb4a7fb5b843b40b8c609c55c4a6a614e9de449dc`	pdf-embedded-file	PDF EmbeddedFile object 4 at offset 0xDB	11205 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`xfa_hex_stage_000.js` `bebae8ffd72106d98e3ab8f58b2f8b04da89df2576a88ec55c340805edfcd3b2`	deobfuscated-js	XFA hex-decoded JavaScript (decompressed, direct) at offset 0x62E	4807 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).

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