Malicious PDF — malware analysis report

Static analysis result for SHA-256 13a434c6c7c7259e…

MALICIOUS

PDF

6.6 KB
MD5: 4ee1ee01955ca038ebf33dc7d0653cd5 SHA-1: 4b62627a718d0b1dd8921ca507bbf4f893479047 SHA-256: 13a434c6c7c7259e8332a934fe8e536ac05580ccb9915d68a8733c0c4453bde7
108 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Dropper.Agent-7231472-0'. Embedded JavaScript streams were extracted, which are heavily obfuscated but likely responsible for downloading and executing a secondary payload. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • ClamAV: Pdf.Dropper.Agent-7231472-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7231472-0
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0005_000.js
2f3d1aa61bc3b61c81a362475ad47813624775beae8b6260ce00b29ed3a13701
pdf-javascript-stream PDF /JS object 5 at offset 0x180 6049 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).
javascript_obj0005_001.js
78508dc17263e791952fbddf0bc221ff4d9691b0270f5136e4e38037806db432
pdf-javascript-stream PDF /JS object 5 at offset 0x1A3 6332 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).