Malicious PDF — malware analysis report

Static analysis result for SHA-256 1814e7ca3a782393…

MALICIOUS

PDF

2.6 KB
MD5: 0bf1e9bfec09b6d8804110a03d76bf7c SHA-1: ad9c0312a225f50ee71ee9e5acdecf5f796f6bf8 SHA-256: 1814e7ca3a7823938e96826d24ff0a36773361353cbe11c93053faedb0c20f67
170 Risk Score

Malware Insights

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

The PDF file contains an embedded exploit targeting CVE-2010-0188 in Adobe Reader. A deobfuscated JavaScript snippet within the file indicates that it attempts to download and execute a file named 'update.exe' from the URL http://www.brenk.strategyobject.com/download_file.php?e=Adobe-90-2010-0188. This suggests a downloader or dropper functionality.

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.brenk.strategyobject.com/download_file.php?e=Adobe-90-2010-0188��
    • 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
b0062e97b0e7d4a06791b9934863baa400bd4ada9bd020755a6e8a135aeaf23d		 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
0544336e64cb383710bdd623671947f37b59e1c91367ef69bd18066d1fa5908c		 deobfuscated-js PDF AcroForm base64 (decompressed) at offset 0x58A 8730 bytes

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