PDF malware analysis — malicious · 4690fc85c394c13e

MALICIOUS

PDF

14.4 KB

MD5: 24086295d7a5e28036108901f85243a0 SHA-1: 8e05b4a697bd04805e50259f8526828e6530ce85 SHA-256: 4690fc85c394c13ed68cc92bf9d272876ca42effa73700601e70748bfd66e06d

168 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.001 Malicious Link: Malicious Link T1204.002 Malicious Link: Malicious File

The sample is a PDF file that utilizes XFA forms and exploits CVE-2010-0188, a known vulnerability in Adobe Reader. The heuristic firings indicate the presence of an XFA form, a numeric eval stager, and a ClamAV detection for Js.Exploit.HTML-30, strongly suggesting malicious intent. The embedded URL, while seemingly benign, is part of the exploit chain. The primary attack vector is the exploitation of the PDF reader's vulnerability.

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: Js.Exploit.HTML-30 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Js.Exploit.HTML-30
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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