Malicious PDF — malware analysis report

Static analysis result for SHA-256 92c4285c43ea4961…

MALICIOUS

PDF

1.2 KB
MD5: 2ba4eeb7bfb60941bb0c33f745e79341 SHA-1: aa7fb176ec8d56018002d4b7be134ae23d9ccd24 SHA-256: 92c4285c43ea49619e88f3a6600a0d822e6eeaa15823b96af210c56f996decd8
78 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, which is a common technique for delivering malicious payloads. The JavaScript stream utilizes unescape() and ASCIIHexDecode filters, indicating obfuscation and potential exploit attempts. The primary function of the embedded script is to execute further malicious code, likely to download and run a second-stage payload.

Heuristics 5

  • unescape() call high PDF_UNESCAPE
    unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
  • 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
  • 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0006_000.js
74783462981b129b8fd36ba2e2b2405f8f07d7c2ee3abc0d738cfa49dee5db49
pdf-javascript-stream PDF /JS object 6 at offset 0x12D 177 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 3 eval/decoder/string-building token(s).