Malicious PDF — malware analysis report

Static analysis result for SHA-256 5812c57e668d0147…

MALICIOUS

PDF

5.2 KB Created: 2002-02-02 59:55:01 Authoring application: e
MD5: e89d082aa7442834831d7c892e53080d SHA-1: e73f9d74ab30b8bf033dd065da145f8fa2f428e6 SHA-256: 5812c57e668d0147a26e0019996b02305014b4f7bc6e55c85febe7c494a82754
102 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file exploits CVE-2010-0188, a vulnerability in Adobe Reader related to LibTIFF XFA image handling. A JavaScript payload was extracted from a decompressed stream, indicating an attempt to execute malicious code. This script likely serves as a downloader for further stages of the attack. The embedded nature of the exploit and script points to a delivery mechanism designed to compromise the user upon opening the PDF.

Heuristics 6

  • 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.
  • Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. 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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0029.bin
3b903e5de9ca7079622c5d24066fc85ab1e03c30a3b87b3da8a2655f06d11788
pdf-embedded-file PDF EmbeddedFile object 29 at offset 0x2F8 96 bytes
stream_003_off000003ab.js
ef723d7cb89580342e9a648738ad8942d67d0b1cf9f226534832fea0daa3ef5e
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3AB 52863 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).