Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa08ed23940b84aa…

MALICIOUS

PDF

31.9 KB
MD5: dadacee29df58145748f81085a63fc8c SHA-1: 701f04f77e49f7525232a1481b313fb1225cc0a1 SHA-256: aa08ed23940b84aa6de5bc9bc3aef037a4855f33da202871b133cbe0be911d34
216 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as 'Pdf.Exploit.Agent-35955' and contains embedded Flash (RichMedia) and JavaScript. The ML classifier also indicated a high probability of maliciousness. The embedded Flash file, 'mwlPfpJXJNtlG.swf', is a strong indicator of an exploit attempt or payload delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Exploit.Agent-35955 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-35955
  • 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.
  • RichMedia (Flash) high PDF_RICHMEDIA
    PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
  • 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
mwlPfpJXJNtlG.swf
e00f8888a663b7605e1a74a39b06c4c4210174facea50eafd361d375f73abd1a		 pdf-embedded-file PDF EmbeddedFile object 16 at offset 0x1565 26774 bytes
Detection
ClamAV: Pdf.Exploit.Agent-35955
Obfuscation or payload: likely
Carved artifact entropy is 7.99, consistent with packed or encrypted content.
javascript_obj0006_000.js
fa379801ef6f886e0fff8d2fa08ca57e23f0a167fac103887f46c605f92d5100		 pdf-javascript-stream PDF /JS object 6 at offset 0x142 3687 bytes

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