Malicious PDF — malware analysis report

Static analysis result for SHA-256 42aec778151c125f…

MALICIOUS

PDF

4.4 KB
MD5: 7647ead54911c1fff3800cb74f49c426 SHA-1: 31ee928c5543628569504ba25b8420624258b113 SHA-256: 42aec778151c125f35f0ede29a7e701f566936605b9b659e6f463e4de3766def
98 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1027 Obfuscated Files or Information

The PDF file contains an XFA form and triggers the critical CVE-2010-0188 heuristic, indicating exploitation of a LibTIFF vulnerability within Adobe Reader. The presence of ASCIIHexDecode and ASCII85Decode filters further suggests obfuscation of the exploit payload. The extracted artifact 'stream_000_off00000207.bin' likely contains the secondary malicious content.

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_off00000207.bin
5e48a815c7b9950d595ec840c7762dbf1d92ac1ded81868fe45e6cdb8583c58a
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x207 13469 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).