Malicious PDF — malware analysis report

Static analysis result for SHA-256 06fcde6c9b3c4038…

MALICIOUS

PDF

2.6 KB
MD5: 89ca571a6fd657e1d6aaa11579a05209 SHA-1: 6611fe2ab9fa366f0016adee1cd697aeacb99020 SHA-256: 06fcde6c9b3c4038baefb606bc09a611dc22020f9735ab716f250e5f0a6b56ce
170 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains an embedded XFA form that exploits CVE-2010-0188 in Adobe Reader. The deobfuscated JavaScript within the PDF attempts to download a file named 'update.exe' from 'http://www.wan.strategyobject.com/download_file.php?e=Adobe-80-2010-0188' using 'urlmon.dll', indicating it's a downloader for a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • Adobe Reader LibTIFF XFA image exploit — CVE-2010-0188 critical CVE likely CVE_2010_0188
    PDF contains XFA image data with an inline crafted TIFF payload and shellcode/delivery markers. This is the data-bound variant of the CVE-2010-0188 Adobe Reader LibTIFF/XFA exploit shape.
  • ClamAV: Pdf.Exploit.Dropped-90 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-90
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • 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.wan.strategyobject.com/download_file.php?e=Adobe-80-2010-0188��
    • http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xci/1.0/
    • http://www.xfa.org/schema/xfa-template/2.4/
    • http://www.xfa.org/schema/xfa-data/1.0/
    • http://ns.adobe.com/xtd/
    • http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0001.bin
963af139f4db48c737233013f4331458bb86e201f1f887b36041b3ba07c8c58a		 pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x5D 13473 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).
acroform_b64_00.js
cc67393566c704ed299c3435e70312ebb0c46635c203b61523a560a729902dfe		 deobfuscated-js PDF AcroForm base64 (decompressed) at offset 0x58A 8730 bytes

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