PDF malware analysis — malicious · 93cdf11b526fce8f

MALICIOUS

PDF

8.6 KB

MD5: 0e7dec099a7b616ea6929cedbc6a9a05 SHA-1: f2084a067b4e661190851742ce9c335832027b9d SHA-256: 93cdf11b526fce8fbbcd48f8b0a3f2941b0b17fa0f96662bbfba6f8c2c9d6bfc

174 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF file contains XFA (XML Forms Architecture) which is known to be vulnerable to heap spray attacks. The heuristic PDF_XFA_HEAP_SPRAY indicates that exploit code was found within an XFA form, specifically designed to trigger a heap spray. This malicious script, likely JavaScript given the XFA context, is embedded and executable, as indicated by PDF_XFA_SCRIPT and PDF_EMBEDDED_SCRIPT_PAYLOAD. The primary goal appears to be the execution of arbitrary code, potentially leading to the download and execution of further malicious content. The embedded URL is likely part of this malicious chain.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 7

XFA form contains risky executable script high CVE related PDF_XFA_SCRIPT

PDF embeds an XFA form whose script block contains exploit, submission/launch, or shell-execution primitives. Ordinary LiveCycle print/update scripts are left as generic XFA/JS signals unless stronger behavior is present.
XFA JavaScript heap-spray exploit code critical PDF_XFA_HEAP_SPRAY

PDF contains XFA script content with heap-spray or shellcode-like JavaScript markers such as large encoded word sequences, util.pack, large arrays, or spray variable names. This is a weaponised Adobe Reader exploit pattern, not a normal interactive form.
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
AcroForm button with action trigger low PDF_ACROFORM_BUTTON

PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://www.xfa.org/schema/xfa-locale-set/2.1/

Extracted artifacts 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0041.bin` `c06dcd026a7ea0536b63e07ce688691b585339a3ab7ff59065e546b56308c7bb`	pdf-embedded-file	PDF EmbeddedFile object 41 at offset 0xE93	85 bytes
`embedded_file_obj0042.bin` `dda0835df994b8be920f715db36452f6cee7bb42bbc9c897f878a7b298ba8e91`	pdf-embedded-file	PDF EmbeddedFile object 42 at offset 0xF45	1029 bytes
`embedded_file_obj99999.bin` `e2092d04e0a65da9a4706fbe8db960963c68043cbef7102f60979471d3ee8a28`	pdf-embedded-file	PDF EmbeddedFile object 99999 at offset 0x1161	22580 bytes
`embedded_file_obj0044.bin` `3dd68f00f4fcb366a2a3a17c65cb2626eeddf5ea5713302d374310561d810169`	pdf-embedded-file	PDF EmbeddedFile object 44 at offset 0x1D24	144 bytes
`embedded_file_obj0045.bin` `10c03f88a5f0a0833dc5b2c8ac295b3a3c6f65e23889eb8cc1dc6fe29bf7f275`	pdf-embedded-file	PDF EmbeddedFile object 45 at offset 0x1DD1	77 bytes

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