Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f1212b75d2d4a7b…

MALICIOUS

PDF

5.1 KB
MD5: 12e2de781a97f511ad2251ec92ec766f SHA-1: ffb8a2515cd8935d856f683770135c3240985c69 SHA-256: 4f1212b75d2d4a7bfcbaade3e104fd9b406a29b379a0707b35e9343b16836512
106 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript and a RichMedia (Flash) object, indicating an attempt to exploit vulnerabilities. The embedded JavaScript stream, named 'javascript_obj0017_000.js', likely contains obfuscated code designed to download and execute a secondary payload. The presence of 'unescape()' further suggests code obfuscation. The file's structure and embedded content point towards a malicious PDF designed for exploitation.

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
a12e41bffe01f6038f138716ef3297e5a9c057a0c2105a2905c87c3ca1cbcb06
pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x4D4 1642 bytes
javascript_obj0017_000.js
8bb72edfd76c83353fe8757b0a04c58de346ee2731911218acce0c3a0e651d4f
pdf-javascript-stream PDF /JS object 17 at offset 0xBF2 1697 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s).