Malicious PDF — malware analysis report

Static analysis result for SHA-256 e992f65351b4167b…

MALICIOUS

PDF

136.8 KB Created: 2011-09-08 05:03:17 Authoring application: FPDF 1.6
MD5: 14ec67d35d733977473baf287da84fe6 SHA-1: c95f00c95aed01f539d00bb567f6c4a35cca3bc4 SHA-256: e992f65351b4167be6f0732bdbc60359952d90391518dd3cc04f7fc31d13ef35
108 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment

This PDF was flagged as malicious by ML classifiers and ClamAV with the signature Pdf.Exploit.Agent-36874. The presence of XFA forms and AcroForm buttons with action triggers indicates an attempt to leverage PDF features for exploitation. The ML classifier's high confidence score further supports the malicious nature of this document. The embedded artifact suggests the presence of exploit code.

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
8272e5475fed3d7ec534ea0219cb2d311d5a7067ecb1e881027fcc19b69efb1a
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8ED 1400 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).