Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f60591d82d3b8a4…

MALICIOUS

PDF

13.1 KB
MD5: 887038329d5bbe3e414dee69e4baac29 SHA-1: a4bb9dd8246726e86e46c5620a1acca1a11c252a SHA-256: 1f60591d82d3b8a401602d9a787a5ab4e8900784f8d02228f9ac42df9f092888
146 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.001 JavaScript

The PDF file contains embedded JavaScript that is triggered by the CVE-2010-0188 exploit. This exploit targets a vulnerability in Adobe Reader's handling of XFA forms. The embedded JavaScript, named 'xfa_metadata_stage_000.js', is likely responsible for downloading and executing a second-stage payload. The presence of the exploit and the embedded script strongly indicate a malicious intent.

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: Pdf.Exploit.Agent-36962 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36962
  • 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
  • AcroForm button with action trigger low PDF_ACROFORM_BUTTON
    PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
  • 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-locale-set/2.1/

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0041.bin
c06dcd026a7ea0536b63e07ce688691b585339a3ab7ff59065e546b56308c7bb
pdf-embedded-file PDF EmbeddedFile object 41 at offset 0x26CC 85 bytes
embedded_file_obj0042.bin
dda0835df994b8be920f715db36452f6cee7bb42bbc9c897f878a7b298ba8e91
pdf-embedded-file PDF EmbeddedFile object 42 at offset 0x277E 1029 bytes
embedded_file_obj0043.bin
c7fcefb3e38dff4f1090b1de9b32357968c3b3ccd3d2224d2aa813fa82abf7ca
pdf-embedded-file PDF EmbeddedFile object 43 at offset 0x2997 1722 bytes
embedded_file_obj0044.bin
3dd68f00f4fcb366a2a3a17c65cb2626eeddf5ea5713302d374310561d810169
pdf-embedded-file PDF EmbeddedFile object 44 at offset 0x2D7C 144 bytes
embedded_file_obj0045.bin
10c03f88a5f0a0833dc5b2c8ac295b3a3c6f65e23889eb8cc1dc6fe29bf7f275
pdf-embedded-file PDF EmbeddedFile object 45 at offset 0x2E28 77 bytes
xfa_metadata_stage_000.js
4a7e0403ed392ad3241ae2457e555b77a0db7ce2becd8a45852a009150f90bb7
deobfuscated-js XFA /keywords base-29 decoded JavaScript (raw) at offset 0xDEA 2181 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).