PDF malware analysis — malicious · c89bb9a5ffca02b5

MALICIOUS

PDF

101.8 KB

MD5: 5ac76e07addbb2fd198587bc80115acc SHA-1: 7a655fb10e14145df76eab0440f941e6032ac528 SHA-256: c89bb9a5ffca02b53d94c2966a22e0fd7cf118575356ed0e07ad656a15e2e472

188 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.001 Spearphishing Attachment

The PDF file contains an XFA form which is exploited using CVE-2010-0188, a known vulnerability in Adobe Reader's handling of LibTIFF images within XFA forms. This exploit is designed to execute arbitrary code, indicated by the embedded script payload. The embedded script is likely responsible for downloading and executing a second-stage payload, although its specific actions are not detailed in the provided evidence. The ClamAV detection further confirms the malicious nature of the file.

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` `0eb3b212d7c865370e5be245dc5ff8c54a4293303338fcc822add145ae43a48f`	pdf-embedded-script	PDF raw stream script payload at offset 0x346	103533 bytes

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