Malicious PDF — malware analysis report

Static analysis result for SHA-256 6defca4c91b57e43…

MALICIOUS

PDF

31.8 KB
MD5: 9eaf2e853d00eae3fba9ffc538caddc4 SHA-1: e90f2df67df68ce779feada388f9154a6a86513a SHA-256: 6defca4c91b57e43a3cb66cc8c26d659ebea2a8451ad00db13afcfce60de3be7
276 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains embedded JavaScript and a Flash RichMedia object that exploits CVE-2010-1297. This exploit is designed to execute a secondary payload, indicated by the ClamAV detection of 'Pdf.Exploit.Agent-35955' and the presence of a SWF file. The JavaScript appears to be obfuscated but is likely involved in the exploitation chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

Heuristics 8

  • Adobe Flash authplay SWF exploit in PDF — CVE-2010-1297 critical CVE likely CVE_2010_1297_FLASH_RICHMEDIA
    PDF combines RichMedia Flash activation, a crafted SWF with ActionScript prototype/AVM-era markers or the AES-PHP/authplay variant markers, and PDF-side shellcode heap-spray staging. This is the static delivery shape associated with CVE-2010-1297 in Adobe Reader's bundled authplay.dll.
  • 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
IQilRlNOpdvFJfu.swf
c2b666a3ef4c191b77b78c037656e50477b8ba3d35fd61ae843a3a1f4d41c5c1		 pdf-embedded-file PDF EmbeddedFile object 16 at offset 0x14EC 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
be89a97d8777261cddddb0d7edeb2115acd3b80ab0e62bf681bc111f116885ab		 pdf-javascript-stream PDF /JS object 6 at offset 0x140 3604 bytes

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