PDF malware analysis — malicious · 4e57283c6792d5e2

MALICIOUS

PDF

6.0 KB Created: 2008-09-24 19:47:56 Authoring application: Adobe

MD5: f8f717357daa5f5efe1e01b5b3b806e9 SHA-1: 58eaad1ea70ec393b3354f4888e64c82e6dce4c3 SHA-256: 4e57283c6792d5e26dbfd29320e58c3d272cecd7682c703fe15653190b9bc0a4

258 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF file contains embedded JavaScript that exploits CVE-2009-0927 and CVE-2007-5659 vulnerabilities in Adobe Reader. The deobfuscated JavaScript, identified as legacy_pdfkit_stage_000.js, is likely responsible for downloading and executing a second-stage payload, as indicated by ClamAV detections of Pdf.Dropper.Agent-1828738 and Js.Exploit.Shellcode-18 on extracted artifacts. The attack pattern involves luring the user into opening a malicious PDF which then leverages these exploits.

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)
ClamAV: Pdf.Dropper.Agent-1828738 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-1828738
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.
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `a5f5ddf01e49f692f3702abd71a24a6ad8ea5eb1732f05bd3b447f97d1da059a`	pdf-javascript-stream	PDF /JS object 6 at offset 0x13E0	130 bytes
`javascript_obj0016_001.js` `dc12d90fbc75e1c8c5f8029dd61740a208ac0f206e1524eeab9f2253eeab75dd`	pdf-javascript-stream	PDF /JS object 16 at offset 0x14A8	158 bytes
`legacy_pdfkit_stage_000.js` `fe2dc017201ae4cbc436c94890de59521529a5a8ceb37b5396448a00809ba392`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1E7	4949 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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