PDF malware analysis — malicious · 5917a9105894626c

MALICIOUS

PDF

28.6 KB

MD5: ea862c5c8f3207f9e9502a8b77e2f02d SHA-1: 4b21e32e9f7fe9ecc10a2e0fb85672fff9800952 SHA-256: 5917a9105894626cba21e280d849ccb2ff63f1f5c295fa0cbc9ec49343dbebef

168 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The sample is a PDF file that leverages XFA forms and exploits CVE-2010-0188, a known vulnerability in Adobe Reader. The heuristic firings indicate that the file contains an XFA form and uses a numeric evaluation stager to execute the exploit. The embedded URL, while not directly malicious in reputation, is associated with XFA templates and likely part of the exploit chain. The decoded XFA payload suggests the execution of a second-stage payload.

Heuristics 5

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.
ClamAV: Pdf.Exploit.Agent-36825 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36825
XFA numeric character-table eval stager high PDF_XFA_NUMERIC_EVAL_STAGER

PDF XFA initialize script reads numeric form data from rawValue, maps the values through a short character table, and evals the reconstructed stage. This is an exploit-kit staging technique even when the final decoded layer remains encoded.
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/

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