PDF malware analysis — malicious · 9ecb6915edc43cdd

MALICIOUS

PDF

97.5 KB

MD5: 1e1cda6c0f90c7600b1c3865e9d60635 SHA-1: 7de09a17bbfe3a6cb76f4d53ffc0eaf9e02535b0 SHA-256: 9ecb6915edc43cdd9b8cd3b3e153f5400bcb5bbc75dc86dfd19a493bedbb3e40

230 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious File T1059.001 PowerShell T1059.003 Windows Command Shell T1059.007 JavaScript

The PDF file contains XFA (XML Forms Architecture) content, which is known to be a vector for exploits. Specifically, the 'CVE_2010_0188' heuristic indicates a vulnerability in Adobe Reader related to LibTIFF and XFA. The 'PDF_XFA_NUMERIC_JS_STAGER' heuristic suggests that JavaScript embedded within the XFA form is used as a stager to download and execute a secondary payload. The deobfuscated JavaScript, although not fully detailed here, is identified as suspicious and likely responsible for this payload delivery. The embedded URL is likely related to the XFA template and not directly to the malicious payload, but the exploit itself is the primary attack vector.

Heuristics 7

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.Dropped-78 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
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.
XFA numeric JavaScript stager high PDF_XFA_NUMERIC_JS_STAGER

PDF XFA script reconstructs a hidden JavaScript stage from numeric field data or a character table, then evals the result. The decoder is gated on XFA script, numeric staging, and recovered exploit-like JavaScript or shellcode markers.
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
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
`xfa_numeric_stage_000.js` `46558eb3ee675541accfb4d5fc37fe2e5317be5492717ab0b14108d190c69916`	deobfuscated-js	XFA character-table decoded JavaScript (raw) at offset 0x2EB	3798 bytes
Detection ClamAV: Pdf.Exploit.Agent-36962 Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s). Carved artifact contains 3 long base64-like blob(s).

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