Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b45ac7cb87da055…

MALICIOUS

PDF

10.5 KB Authoring application: 065beFotinocp
MD5: 14773160b7256438ffc174a11054501a SHA-1: 40da5d1c3e0c7a524b2b2df72da72f5acb94f5a2 SHA-256: 1b45ac7cb87da055d1b069c30352051fd3365a1225cc0b82e091a05584957b02
298 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains JavaScript that is obfuscated and triggered by the OpenAction feature. The heuristics indicate exploitation of multiple CVEs related to PDF JavaScript execution, specifically CVE-2009-4324, CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. This JavaScript is likely designed to download and execute a second-stage payload, although the exact payload and destination could not be determined from the provided evidence.

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)
  • util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992
    PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (identified after JavaScript deobfuscation)
  • OpenAction trigger high PDF_OPENACTION
    PDF has an /OpenAction — code runs automatically when opened
  • 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_obj0018_000.js
28e126fd681bb67841458ad412d44aff51def35b562ce673729a588d3a4c3fc2		 pdf-javascript-stream PDF /JS object 18 at offset 0x1A8B 4590 bytes
page_word_xor_stage_000.js
ee29a91a5fc99afca9ff19ff83d932f29d2a657214e9f0c2726decd2a9dfda13		 deobfuscated-js page-word XOR decoded JavaScript (decompressed, key=0x7B) at offset 0x7AB 3049 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 eval/decoder/string-building token(s).

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