Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d10fd1f2acc7a25…

MALICIOUS

PDF

23.5 KB Created: 2009-05-01 21:21:45 Authoring application: tvEeSFCPx (via NeTSnrx)
MD5: 944a95373da479fb0fcb3d20f98f774c SHA-1: 9face70cc50995f8e571c449d3ed3831b9c9cc5c SHA-256: 3d10fd1f2acc7a255416fffcf1f051db415ed573aa5cb089e81cf7f273666b98
456 Risk Score

Malware Insights

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

This PDF document is malicious, leveraging multiple critical vulnerabilities including CVE-2009-0927 (Collab.getIcon), CVE-2007-5659 (Collab.collectEmailInfo), and CVE-2008-2992 (util.printf). These exploits allow for the execution of arbitrary JavaScript. The embedded JavaScript streams, particularly 'numeric_charcode_stage_000.js', are heavily obfuscated but indicate the execution of a second-stage payload. The ClamAV detection 'Pdf.Dropper.Agent-1828709' further confirms its malicious nature as a dropper.

Heuristics 11

  • 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)
  • ClamAV: Pdf.Dropper.Agent-1828709 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-1828709
  • 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.
  • OpenAction trigger high PDF_OPENACTION
    PDF has an /OpenAction — code runs automatically when opened
  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution
  • unescape() call high PDF_UNESCAPE
    unescape() found — often used to decode shellcode in PDF JS exploits
  • Suspicious extracted artifact medium 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.
  • 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.

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0007_000.js
8d4905a8a925e2e4f0345eb52e725bb86abc6cd3f375322d811bb03cffcb839e		 pdf-javascript-stream PDF /JS object 7 at offset 0x22D 22764 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 2 long hex-escaped blob(s).
javascript_obj0007_001.js
48b85ecef71bdc1c39637b72d1e45bb2c2f84da13ac1ada6cafd360f418e3501		 pdf-javascript-stream PDF /JS object 7 at offset 0x22D 20732 bytes
numeric_charcode_stage_000.js
a1b92c066fb6cbed1d319ea7eb63dd8b4ce5eaedec157072b49b675e6d6c1627		 deobfuscated-js numeric char-code string decoded JavaScript at offset 0x236 4854 bytes
Detection
ClamAV: Js.Exploit.Shellcode-18
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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