Malicious PDF — malware analysis report

Static analysis result for SHA-256 310fda97deda1409…

MALICIOUS

PDF

6.9 KB Created: e1svrt Authoring application: Adsfgddfobe (via sfgasdfgsd)
MD5: d1fb59dac8c5402cc96adf70888c0f6f SHA-1: bdf73938fe02354882c9b2c9fc5c073695d0f784 SHA-256: 310fda97deda140913654de2ae39ff1a348cedc5cf781c785a3ed7cb37ba85ef
318 Risk Score

Malware Insights

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

Multiple critical heuristics indicate the exploitation of known PDF vulnerabilities (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659) via embedded JavaScript. ClamAV detections further confirm the malicious nature, identifying it as Pdf.Exploit.Agent-21045 and an extracted artifact as Js.Exploit.Shellcode-18. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload.

Heuristics 8

  • media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324
    PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009. (identified after JavaScript deobfuscation)
  • 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.Exploit.Agent-21045 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-21045
  • 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.
  • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0006_000.js
5473db5fb7a9173f7950734accb42498003c8799aa1a7eaadaccb5eecbf0ef25		 pdf-javascript-stream PDF /JS object 6 at offset 0x14A 580 bytes
legacy_pdfkit_stage_000.js
1338d744ea87109081cc28f3a2f61ee2887ac35b80263a599db2e2d940989c53		 deobfuscated-js repeated-marker hex decoded JavaScript at offset 0x34A 11312 bytes
Detection
ClamAV: Js.Exploit.Shellcode-18
Obfuscation or payload: likely
Carved artifact contains 12 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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