Malicious PDF — malware analysis report

Static analysis result for SHA-256 64e108f364530347…

MALICIOUS

PDF

2.6 KB
MD5: 97dca46cb6368d6f9b098d45c705b876 SHA-1: 359b7d69ccc92fc8b910588bfdc606ea43e5c1f6 SHA-256: 64e108f364530347499e9d4eb7c446f2301446b85c8a6b51232bdcf18de75911
170 Risk Score

Malware Insights

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

This PDF file exploits CVE-2010-0188, a known vulnerability in Adobe Reader related to XFA forms and TIFF image parsing. The embedded JavaScript, though truncated, indicates attempts to download and execute a second-stage payload from the URL http://saspoo.com/tst3901.jpg. The ML classifier strongly flagged this PDF as malicious.

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 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.
  • 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://saspoo.com/tst3901.jpg
    • 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
e06c1ccff10b8f831ec782b7fed28e698f94912325f7b72e9a087e3a8fda4400		 pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x51 13430 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).
acroform_b64_00.js
05ecc40d8da5bc22c8780e0997d2cd693a866702b143d237bb5c32586b33b59c		 deobfuscated-js PDF AcroForm base64 (decompressed) at offset 0x586 8642 bytes
Detection
ClamAV: Win.Exploit.CVE_2010_0188-7
Obfuscation or payload: unlikely

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