PDF malware analysis — malicious · f46d23b1a246b8a5

MALICIOUS

PDF

72.7 KB Created: 2009-11-23 19:49:61 Authoring application: PDF Library 2.7.1 (via PDF Library 2.2.6)

MD5: e5d6ae6c2b13c03cc24c5babd3afd966 SHA-1: 98bd0b6b9beb3da418381cd1480f75b0bbca6c33 SHA-256: f46d23b1a246b8a554b4d63df878a91f971366bf1d14b89be791e1c3965523bb

280 Risk Score

Malware Insights

MITRE ATT&CK

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

The 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). These exploits are delivered through obfuscated JavaScript, with a deobfuscated stage identified as 'legacy_pdfkit_stage_000.js'. The primary function of this script is to download and execute a second-stage payload, indicated by the exploit kit indicators and ClamAV detection.

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` `ff8755d29b36586123f40f470cf43ed572cfed3aeabfadf2596914e2c6d9a6ee`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	36693 bytes
`legacy_pdfkit_stage_000.js` `8bce03f09703dfcd784353ec7d1f1d22ff974f213fcb867c6577915c86963109`	deobfuscated-js	numeric array subtract-key decoded JavaScript at offset 0x1A5	9508 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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