Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c4bf1de1e8fdd26…

MALICIOUS

PDF

10.5 KB
MD5: 3f99352d5f81ed4638f14f5bf02182e8 SHA-1: e047937009102126246217abe74f05b1a01134b4 SHA-256: 0c4bf1de1e8fdd266bf4322b180e1c080f44563fc53ec31dfbea18ca766b816e
108 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The file is identified as malicious by multiple engines, including ClamAV which flagged it for obfuscated objects. The presence of XFA forms and embedded files suggests an attempt to execute embedded content, likely JavaScript, to achieve its malicious objective. The lack of readable document body text and the nature of the heuristics point towards a downloader or exploit delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PSSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.