Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6a5c26d80a3dd03…

MALICIOUS

PDF

7.6 KB Created: 2009-10-31 19:49:45 Authoring application: PDF Library 8.4.2 (via PDF Library 8.5.10)
MD5: 80dd52f15c292bacdff5f59c6c7c25b1 SHA-1: b97d4cfbf40af03b71eb5a1ddee0ef8d9e31fb71 SHA-256: f6a5c26d80a3dd03b3cdee05a59bf63504a8001c74d9cb82be474fb0b34183b1
116 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical ClamAV detection and the 'Suspicious extracted artifact' heuristic further confirm its malicious nature. The JavaScript stream, named 'javascript_obj0007_000.js', is likely responsible for downloading and executing a second-stage payload, a common technique for PDF-based malware droppers. The ASCIIHexDecode filter also suggests obfuscation techniques used to hide malicious content.

Heuristics 5

  • ClamAV: Pdf.Dropper.Agent-7324878-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7324878-0
  • ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX
    Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
  • Suspicious extracted artifact medium 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.
  • 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0007_000.js
cbba607a68fae8af9bbc531612facb1b1c7a9499290b23a849b9bafa2569568d
pdf-javascript-stream PDF /JS object 7 at offset 0x268 37497 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long hex-escaped blob(s).