PDF malware analysis — malicious · 275235f3e3865d50

MALICIOUS

PDF

3.5 KB Authoring application: rxode (via va)

MD5: e5b637a3a2cefcb0172d79e6795a6ab1 SHA-1: 2745fd69b4c6e3b7f8202ae89f37f3ac2b4ed52f SHA-256: 275235f3e3865d506bf31f6503b3311afcdaf4240896649993a4b867879f3ccf

280 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution T1059.007 JavaScript T1059.001 PowerShell

The PDF document contains XFA (XML Forms Architecture) which is known to be vulnerable to several Adobe Reader exploits. The heuristics indicate that the XFA script decodes a hex string to execute exploit code targeting 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. The embedded file 'embedded_file_obj0004.bin' is likely this payload.

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` `f60ea900b585da5691be9608f4155739cd49fda975035770ddc251036a591630`	pdf-embedded-file	PDF EmbeddedFile object 4 at offset 0xDC	11253 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`xfa_hex_stage_000.js` `29bdae29a944c04a94860130ee1bb1a70f442bfe81e7d93e044aff386fd27e8c`	deobfuscated-js	XFA hex-decoded JavaScript (decompressed, direct) at offset 0x651	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).

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