Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4e639e94063a42c…

MALICIOUS

PDF

4.4 KB
MD5: b432009603a45845a85aa7326ddf1167 SHA-1: 4239a8ef537b468325c678217750c6f051e6df33 SHA-256: a4e639e94063a42c1d12fd69777ce99c73aae1ca5a04219388bd261be671f814
98 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.001 PowerShell

The PDF file contains a critical heuristic indicating exploitation of CVE-2010-0188, a known vulnerability in Adobe Reader related to XFA forms and LibTIFF. This exploit is designed to achieve arbitrary code execution. The presence of XFA form elements and the use of ASCIIHexDecode and ASCII85Decode filters further support this attack vector. The primary goal is likely to download and execute a secondary payload.

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
2a3c77a4c7afda6dd882ce1f46838f55a34fad95b4ecae67f5910b7eb24dfb0e
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).