PDF malware analysis — malicious · 40d629e71341d2cc

MALICIOUS

PDF

55.3 KB

MD5: 106961bc3742873d013f885cb8f00905 SHA-1: b0e9b939570fb26e3d7e218586f92eaf25b7a665 SHA-256: 40d629e71341d2ccc5986715aa91d7b2cb20f512c63014c8b7d4a0cae4adabf2

232 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

This PDF file contains XFA (XML Forms Architecture) content, which is known to be a vector for exploits. The heuristic 'CVE_2010_0188' indicates a specific vulnerability in Adobe Reader related to XFA image handling. The extracted JavaScript file 'xfa_numeric_stage_000.js' is identified by ClamAV as 'Js.Exploit.HTML-30', suggesting it's an exploit stager. The overall intent appears to be downloading and executing a second-stage payload, as indicated by the ClamAV detection 'Pdf.Exploit.Agent-36962' on an extracted artifact. The embedded URL is likely part of the exploit chain.

Heuristics 8

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
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
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PSEOF. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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` `59c8ad66320ce55f342a3cd0d939ba60afeffeda94ab0597b1cea79bf940597a`	deobfuscated-js	XFA replacement character-table decoded JavaScript (raw) at offset 0x30C	4071 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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