Malicious PDF — malware analysis report

Static analysis result for SHA-256 9851910471252bee…

MALICIOUS

PDF

171.1 KB Created: 2010-11-01 22:42:46 -03:00 Authoring application: Acrobat Web Capture 9.0
MD5: 63448c96de3abd3e5f7c884ade38b8b0 SHA-1: 7f46ee1b40fddf3e66ab2cf17a82d97161619be6 SHA-256: 9851910471252beea21c2c600fdc6fda53e9dc455c6a63106f42a372970c392d
186 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file was detected as malicious by ClamAV with the signature Win.Trojan.Agent-36159. Static analysis revealed embedded JavaScript and a RichMedia (Flash) object, indicating a potential exploit or payload delivery mechanism. An embedded JavaScript file named 'javascript_obj0141_000.js' and a SWF file named 'trigger.swf' were extracted, suggesting they are components of the malicious functionality.

Heuristics 8

  • ClamAV: Win.Trojan.Agent-36159 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Agent-36159
  • 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.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/sType/ResourceRef#
    • http://adobe.com/AS3/2006/builtin
    • http://ns.adobe.com/pdf/1.3/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
trigger.swf
48501ae489165c447c6b239054637b572224de7d470c78334fcad19ae9ee8d0f		 pdf-embedded-file PDF EmbeddedFile object 27 at offset 0x7DF1 50282 bytes
javascript_obj0141_000.js
c31d2573a81b7f74c438d3c98a4028ec257b3d38126695791c5e3024e54f29da		 pdf-javascript-stream PDF /JS object 141 at offset 0x29D54 1995 bytes
Detection
ClamAV: Win.Trojan.Agent-36159
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).
icc_00_off00019272.icc
653b586c4707574ffcd648ba35494daed2c76ceafcf4c07d315ed961b1dc347f		 pdf-icc-profile PDF ICC profile at offset 0x19272 408 bytes
icc_01_off000193ac.icc
2b3aa1645779a9e634744faf9b01e9102b0c9b88fd6deced7934df86b949af7e		 pdf-icc-profile PDF ICC profile at offset 0x193AC 3144 bytes

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