PDF malware analysis — malicious · 50dcf9be55c39aaa

MALICIOUS

PDF

74.8 KB Created: 2009-12-22 19:45:12 Authoring application: PDF Library 8.1.9 (via PDF Library 9.5.8)

MD5: 1ff7e34e1621653cf92b9e26d0c911c0 SHA-1: cfcd4f6554e573d2309709a0219c3894740d3f80 SHA-256: 50dcf9be55c39aaa1e155a040909b435acfe1d48e6457c12b76c5919c1b80018

280 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains embedded JavaScript that exploits multiple Adobe Reader vulnerabilities, specifically CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. These exploits are triggered by specific JavaScript API calls within the document. The file was detected by ClamAV as Pdf.Exploit.Agent-36110, indicating it's a known exploit kit stage. The primary attack vector is the exploitation of these vulnerabilities to execute a malicious payload.

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` `d326cdf7c319c122a3ba11c9cb3b2392b22cdf7deddea99eb3965595dddf3e38`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	37792 bytes
`legacy_pdfkit_stage_000.js` `03fc5898561b969ccfb1e93c474691a3914bdffc69bdeb65db53a174db2cdffb`	deobfuscated-js	numeric array subtract-key decoded JavaScript at offset 0x1A5	9778 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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