Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f94777d29386447…

MALICIOUS

PDF

7.2 KB
MD5: 0f55e3bdf2c07a224084f4527388ea36 SHA-1: d244dd2cf2052eda26c9dfa213ee841ec72986ad SHA-256: 4f94777d293864470e08d66afcde24aacb02d9d7ff30585ff7f104ed43033460
106 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: Malicious File

The PDF file contains embedded JavaScript and a Flash object, indicating an attempt to exploit vulnerabilities. The presence of `unescape()` and JavaScript streams, along with the 'Suspicious extracted artifact' heuristic, suggests the script is designed to obfuscate malicious code and likely download a second-stage payload. The embedded 'exploit.swf' further supports the exploit vector.

Heuristics 6

  • RichMedia (Flash) high PDF_RICHMEDIA
    PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
  • unescape() call high PDF_UNESCAPE
    unescape() found — often used to decode shellcode in PDF JS exploits
  • 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.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • 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
embedded_file_obj0014.bin
32f542d8e18861a34d7c7593790c605f5b76967d5833cc2925748417a988196d
pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x4D4 3764 bytes
javascript_obj0017_000.js
8bb72edfd76c83353fe8757b0a04c58de346ee2731911218acce0c3a0e651d4f
pdf-javascript-stream PDF /JS object 17 at offset 0x143C 1697 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s).