Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ad8c2a9d90c684d…

MALICIOUS

PDF

10.4 KB
MD5: f086613bfe33df500698e16f31cb3a40 SHA-1: fa6a1e48e05c6187740327a8d6cfb0021ef5e497 SHA-256: 1ad8c2a9d90c684d60b5e9656cd84b8a8fa9e89960a1de6202a9273f63f9083e
108 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including a critical ClamAV detection for obfuscated objects and an ML classifier indicating high maliciousness. The presence of an embedded file, 'embedded_file_obj0001.bin', suggests it's a delivery mechanism for further malicious content. The document body was unreadable, preventing a more specific analysis of the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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
embedded_file_obj0001.bin
99e05e57d9833c3a8fe95c70906f63518c4063992add6af9c552c50ff6e8ba98
pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x7E 13408 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).