Rozena — PDF malware analysis

Static analysis result for SHA-256 c9709f467873614f…

MALICIOUS

PDF

75.5 KB
MD5: 59dc4e6fe21931b7d45b55b7cc79334e SHA-1: f691b00f645d131235c65ce10cb0492ec2a8906f SHA-256: c9709f467873614f0daa9762707e343ea351bd3c8610a4c481461fc7cbb6b779
224 Risk Score

Malware Insights

Rozena · confidence 95%

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

The PDF file contains embedded JavaScript and a Windows executable payload (mymeterpreter.exe). The document body explicitly instructs the user to click to save and launch the executable. ClamAV identified the embedded payload as Win.Trojan.Rozena-131. The JavaScript actions likely facilitate the execution of the embedded payload.

Heuristics 7

  • Embedded Windows executable payload in PDF stream critical PDF_EMBEDDED_PE_PAYLOAD
    PDF stream bytes contain an embedded Windows executable with a verified PE header. Exploit chains often hide droppers inside ordinary streams rather than standard /EmbeddedFile attachments.
  • ClamAV: Win.Trojan.Rozena-131 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Rozena-131
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • 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.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
mymeterpreter.exe
c0169993fbbab0321d193997f4cdb153bad56105ff51f2f663115ad1128982f1		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0x3CB 37888 bytes
Detection
ClamAV: Win.Trojan.Rozena-131
Obfuscation or payload: unlikely
javascript_obj0009_000.js
4d4cdd35881615df6953ef7a9390a5e29c2a020d4a42c7f4e62a982ba3fda82e		 pdf-javascript-stream PDF /JS object 9 at offset 0x12BDF 66 bytes
javascript_obj0009_001.js
7f1b48cbb70c53a6ff6758abf051dec3379f2b692c8b61e50f42dcab23a91929		 pdf-javascript-stream PDF /JS object 9 at offset 0x12BDF 64 bytes

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