PDF malware analysis — malicious · c1ec18d96764b3f0

MALICIOUS

PDF

13.2 KB

MD5: fd40fd464e3f3ddfc86ec7105d375cef SHA-1: 89680f7a989040e00fcc68bc407d1ee0d892bbd4 SHA-256: c1ec18d96764b3f0d8e0a5797740b02b48ebfc6570a528fb8ff0343544023d5e

272 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1059 Command and Scripting Interpreter

The PDF file contains an XFA form that triggers an exploit for CVE-2010-0188 in Adobe Reader. Embedded JavaScript within the XFA form is responsible for executing the exploit payload. ClamAV detections confirm the malicious nature of the file, identifying it as Pdf.Exploit.Agent-6136306-0 and an extracted JavaScript exploit (Js.Exploit.HTML-28). The embedded URL is likely related to the XFA template but does not appear to be a direct payload delivery mechanism.

Heuristics 10

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
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
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.
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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-template/2.5/

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_pdf_script_000003ca.bin` `b2282d37de5370477b8998eee878c823db166c08bfbb1f7a9cbcab2466850901`	pdf-embedded-script	PDF raw stream script payload at offset 0x3CA	12493 bytes
Detection ClamAV: Js.Exploit.HTML-28 Obfuscation or payload: unlikely

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