PDF malware analysis — malicious · efca6a74624d5d59

MALICIOUS

PDF

51.7 KB

MD5: 22bb58dca75990d77a7003da1420fb5c SHA-1: 5820cf56f94a5f5d70b526b257feeb2589e00bc8 SHA-256: efca6a74624d5d59b2e9c460207c5c407979b8ee39910307848f1c5963428b61

174 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1059.001 PowerShell

This PDF file contains XFA (XML Forms Architecture) data, which is known to be a vector for exploits. The heuristic 'CVE_2010_0188' specifically indicates exploitation of a LibTIFF vulnerability within Adobe Reader. A JavaScript stager was recovered, which is designed to download and execute a second-stage payload. The ClamAV detection 'Js.Exploit.HTML-30' further confirms the malicious nature of the embedded script.

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: Js.Exploit.HTML-30 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Js.Exploit.HTML-30
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` `b9188502addff884a4447fe5226b657395d09119b28e816df3f83bbd660c41b8`	deobfuscated-js	XFA replacement character-table decoded JavaScript (raw) at offset 0x30C	3759 bytes
Detection ClamAV: No threats found 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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