Malicious PDF — malware analysis report

Static analysis result for SHA-256 538edd4b0579ae05…

MALICIOUS

PDF

4.4 KB
MD5: e35a4bb2747c4455ec8aab2bcb9aac07 SHA-1: 2c350820f337bacd45283c2214df3e59fb3b1332 SHA-256: 538edd4b0579ae05c044970e2471a3c7c883df8103d93f9e925cf63d4801279c
98 Risk Score

Malware Insights

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

The PDF file contains an XFA form and triggers the CVE-2010-0188 heuristic, indicating it exploits a vulnerability in Adobe Reader related to LibTIFF XFA image handling. The exploit is embedded within a decompressed stream, suggesting it's designed to download and execute a second-stage payload. The presence of ASCIIHexDecode and ASCII85Decode filters further supports the obfuscation and delivery of exploit code.

Heuristics 5

  • 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.
  • ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX
    Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • ASCII85Decode filter (with exploit indicators) low PDF_FILTER_85
    ASCII85 encoding filter present alongside exploit delivery indicators — uncommon outside of obfuscation
  • 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_000_off000001f9.bin
dc84822cbd2ab48fb5355c26d18c498c2f4145ed1c7c518d850318a5f0d12c60
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1F9 13469 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).