Malicious PDF — malware analysis report

Static analysis result for SHA-256 e86e0cc3d9c70f4b…

MALICIOUS

PDF

6.0 KB Created: 2008-09-24 19:47:56 Authoring application: Adobe
MD5: e99777bf2afe1de4a04e318e15a3a53f SHA-1: fa16ce786ff1fb939ba3361a134aadb2502fa4e5 SHA-256: e86e0cc3d9c70f4bd82dbf2bb99028d1e1ee6fce4749573c9ca7a07a9d9270dc
200 Risk Score

Malware Insights

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

The PDF document contains embedded JavaScript streams that leverage known vulnerabilities (CVE-2009-0927 and CVE-2007-5659) through the Collab.getIcon and Collab.collectEmailInfo methods. The deobfuscated JavaScript file 'legacy_pdfkit_stage_000.js' suggests a dropper functionality, likely intended to download and execute further malicious content. ClamAV also identified this as Pdf.Dropper.Agent-7318516-0.

Heuristics 6

  • Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927
    PDF JavaScript calls Collab.getIcon — CVE-2009-0927 is a stack buffer overflow in Adobe Reader triggered by Collab.getIcon() with a crafted argument. Allows arbitrary code execution. (identified after JavaScript deobfuscation)
  • Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659
    PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (identified after JavaScript deobfuscation)
  • ClamAV: Pdf.Dropper.Agent-7318516-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7318516-0
  • 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.
  • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0006_000.js
5cb31b26033cd7a80e3832474fa890f35006176f356e4936ce1d96f4626787ab		 pdf-javascript-stream PDF /JS object 6 at offset 0x13ED 133 bytes
javascript_obj0016_001.js
0d7ab0d1a130b91832c997e8b496b1a73346ab7a7aff012e9d79984cd6b551b8		 pdf-javascript-stream PDF /JS object 16 at offset 0x14B8 164 bytes
legacy_pdfkit_stage_000.js
4006f895626b501edf2feef51665e532c25f5d7426d308b9e42b517dd1a74a5d		 deobfuscated-js repeated-marker hex decoded JavaScript at offset 0x1E7 4949 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 9 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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