PDF malware analysis — malicious · fa21330f3b323e25

MALICIOUS

PDF

101.9 KB

MD5: 6d67b28ba9c8d2240bf2b3da04d9dba9 SHA-1: c4dda3cf27aa64046476322deecb7190d5b2c7af SHA-256: fa21330f3b323e25d31b1ba8da4bde057731bf44a85f0e49a0a1981d923752e6

188 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.001 PowerShell

The sample is a PDF file that contains an XFA form, which is known to be a vector for exploits. Static analysis detected a critical heuristic firing for CVE-2010-0188, indicating exploitation of Adobe Reader's LibTIFF component. An embedded script payload was also found, further supporting the malicious nature of the file. The embedded script is likely responsible for downloading and executing a second-stage payload.

Heuristics 6

Adobe Reader LibTIFF XFA image exploit — CVE-2010-0188 critical CVE likely CVE_2010_0188

PDF contains the CVE-2010-0188 exploit template: XFA JavaScript heap-spray setup, a generated TIFF image payload, and assignment of that TIFF data to an XFA image field rawValue to trigger Adobe Reader's LibTIFF parser.
XFA form contains executable script high CVE related PDF_XFA_SCRIPT

PDF embeds an XFA form whose dataset contains a <script> or <xfa:script> block — XFA scripting has been the exploit primitive for several Adobe Reader RCEs (CVE-2010-0188 family, CVE-2018-4901, and others). Plain XFA without scripts is far less risky.
ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
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.
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
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-template/2.5/

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_pdf_script_00000346.bin` `440ac35f99d22f87fdca418e57ec6479293fd3ad31ebc92c027ecdfed4862122`	pdf-embedded-script	PDF raw stream script payload at offset 0x346	103569 bytes

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