PDF malware analysis — malicious · dc98def36e9e2655

MALICIOUS

PDF

180.1 KB

MD5: 301885a05c099ceadd8569ba1e65cf0e SHA-1: a63eb85cfb6f4e45a066e652e7d953a16e4dcee4 SHA-256: dc98def36e9e26552f4f650762b761293f871f39b53a12ca28e95abbbfa23c11

318 Risk Score

Malware Insights

MITRE ATT&CK

T1204.001 Malicious Link: Malicious Applet T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains embedded JavaScript that leverages multiple critical vulnerabilities (CVE-2009-0927, CVE-2007-5659, CVE-2008-2992) to execute malicious code. ClamAV detections on both the original PDF and extracted artifacts confirm its malicious nature. The embedded JavaScript is designed to download and execute a second-stage payload, as indicated by the 'Js.Exploit.Shellcode-18' detection on an extracted file.

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-36117 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36117
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0008_000.js` `de6758fd50bfbeca4e3a01c5cf94085dec66c261dc361366c41f26baaeba7e3c`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	2674 bytes
Detection ClamAV: Pdf.Exploit.Agent-36307 Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_000.js` `3fc8e3a75b748803d3d8e4539101a9b45003833c27de86f171e702506bff1b08`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xC8D	20099 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 11 eval/decoder/string-building token(s).

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