Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1d6f03e75fbf949…

MALICIOUS

PDF

136.8 KB Created: 2011-09-08 05:03:17 Authoring application: FPDF 1.6
MD5: 2ebf465b0fba02b2f114db9f8eea3aaf SHA-1: ee52bd9c04fa2348cb337701570022684852188b SHA-256: d1d6f03e75fbf949cd3c5e13f5c14b5fba0e1fdc8ab6ffe16464df441ddcfbfe
108 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious File

The file is a PDF document flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Exploit.Agent-36874'. The ML classifier also strongly indicates maliciousness. The presence of XFA forms and AcroForm buttons suggests an attempt to leverage PDF features for exploitation. The extracted artifact 'stream_001_off000008ed.bin' is a suspicious, long encoded blob, likely containing the exploit payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Exploit.Agent-36874 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36874
  • 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_001_off000008ed.bin
60f0fa461abcafd1a8f78b3d654718f5c7376e71f8fb52f1241862e692b8517a
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8ED 1432 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).