PDF malware analysis — malicious · 3e6ae205858aa5f9

MALICIOUS

PDF

76.8 KB Created: 2009-12-07 19:44:43 Authoring application: PDF Library 1.7.8 (via PDF Library 4.8.2)

MD5: fc766da0556311469a487f97d186be43 SHA-1: d642217a01e58b306f190683619491083f1dee4b SHA-256: 3e6ae205858aa5f9510fff4a7d88dd602292173fc9f71a7aae610cd59ed17d24

338 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

This PDF file is malicious and exploits multiple known Adobe Reader vulnerabilities including CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. The embedded JavaScript, identified as legacy_pdfkit_stage_000.js, is responsible for triggering these exploits. ClamAV detections further confirm its malicious nature, identifying it as Pdf.Exploit.Agent-36110 and its extracted artifact as Js.Exploit.Shellcode-18. The primary attack pattern involves leveraging these CVEs to execute arbitrary code.

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.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `637931b1e12de7e64711a4491f988a0155c5c67693ab5b7d79c382e61a1c2e4b`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	38802 bytes
`legacy_pdfkit_stage_000.js` `9f5fb4a643cf1a32ff344e5d117da92ad6120edd7b041b55d8c1a7827eb47e8a`	deobfuscated-js	numeric array subtract-key decoded JavaScript at offset 0x1A5	10018 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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