PDF malware analysis — malicious · 419b7482bd296a76

MALICIOUS

PDF

70.8 KB Created: 2009-11-18 19:41:42 Authoring application: PDF Library 4.10.8 (via PDF Library 4.5.9)

MD5: 21f030ac2e7dc0000ba15902d49efcd1 SHA-1: ccb399dc02e43ba65a6cf5607efa121b4c93d635 SHA-256: 419b7482bd296a76498b0cb149e6d6673326bb91c2b212ed117717a131882ead

280 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

This PDF file exploits multiple known vulnerabilities in Adobe Reader, specifically CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992, through embedded JavaScript. The exploit appears to download and execute a second-stage payload, as indicated by the 'legacy_pdfkit_stage_000.js' artifact. The primary attack vector is the exploitation of these CVEs via the PDF's JavaScript actions.

Heuristics 8

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
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` `098ad6ad988c3450e6169b9d45524d0d7d87d3caad53b83723e37a32fd1d22ff`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	35764 bytes
`legacy_pdfkit_stage_000.js` `7c60e44f1cdaa57cea9166596f5ce18f7f3f066b01a2aa354f7baec33fc6dc0d`	deobfuscated-js	numeric array subtract-key decoded JavaScript at offset 0x1A5	9568 bytes
Detection ClamAV: No threats found 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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