PDF malware analysis — malicious · 457647412fa1595b

MALICIOUS

PDF

125.6 KB

MD5: da91f2f30a7c8ed522587537a9ddfb91 SHA-1: fe12b0ef9f18ac872deae0200db9829f155b5a96 SHA-256: 457647412fa1595bb57b83ace37244ae6616b08461613bc7b7f996c85021ab2f

318 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file contains embedded JavaScript that exploits multiple known vulnerabilities including CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. The embedded JavaScript, found in legacy_pdfkit_stage_000.js, is obfuscated but appears to be designed to download and execute a secondary payload, as indicated by ClamAV detections of 'Win.Trojan.Agent-36169' and 'Js.Exploit.Shellcode-18' on extracted artifacts. The DOC BODY content is highly obfuscated and does not provide clear user-facing text, but the presence of JavaScript actions and exploit-related heuristics strongly suggests a malicious intent.

Heuristics 7

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: Win.Trojan.Agent-36169 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Agent-36169
JavaScript action low 1 related finding 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_obj0008_000.js` `4e54845c197587498bff2b771fc97247501464d7c9060535cea5c53f131613d5`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	1903 bytes
Detection ClamAV: Win.Trojan.Agent-36169 Obfuscation or payload: unlikely
`legacy_pdfkit_stage_000.js` `275f7d1acebf402ca072e8c82dd5de96528ce82ce5b301479028c641385776ff`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x98A	8394 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 9 eval/decoder/string-building token(s).

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