Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e017473f971a640…

MALICIOUS

PDF

76.1 KB Created: 2010-01-04 19:43:90 Authoring application: PDF Library 9.3.8 (via PDF Library 7.4.5)
MD5: a2b7e460331c630ee8e2e39530b2e2ee SHA-1: fbb1b67cb2a4eb9185abffd2304c8c87790befc4 SHA-256: 2e017473f971a640ecc174cf41f0bdeb7d3bd9ba0c21894bbb50604409afb938
338 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript that leverages multiple critical vulnerabilities in Adobe Reader, specifically CVE-2009-0927 (Collab.getIcon), CVE-2007-5659 (Collab.collectEmailInfo), and CVE-2008-2992 (util.printf). The embedded JavaScript, identified as 'legacy_pdfkit_stage_000.js', is heavily obfuscated but static analysis indicates it decodes and executes shellcode. ClamAV detections further confirm its malicious nature, flagging it as 'Pdf.Exploit.Agent-36110' and an extracted artifact as 'Js.Exploit.Shellcode-18'. The primary attack vector is the exploitation of these known PDF reader flaws to achieve arbitrary code execution.

Heuristics 9

  • 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.Exploit.Agent-36110 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36110
  • 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.
  • ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX
    Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
  • 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_obj0007_000.js
6fd41d16627c828123b3d31bc01a2a5ed02d9c4ea27e0fec5ecf0293852624ea		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 38436 bytes
legacy_pdfkit_stage_000.js
4acd570f83460b74c84d146b1cdec341da99f9839507aeaf42935a638d04fef9		 deobfuscated-js numeric array subtract-key decoded JavaScript at offset 0x1A5 10024 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).

Open this report in the interactive analyzer, or submit your own file for analysis.