PDF malware analysis — malicious · 43627119adcbc377

MALICIOUS

PDF

40.8 KB

MD5: ab8b1859f02e630780aa4f4ea723a78f SHA-1: 8b5c5f625ab784ff7f904da532cec9a3c32a77df SHA-256: 43627119adcbc3770bcdccc2d336081246871b4d2dc658b6bf040d9cb52a1c72

178 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. A critical heuristic, CVE_2007_5659, specifically points to the use of 'collab.collectEmailInfo' to execute JavaScript, a known exploit technique. ClamAV also detected this as Pdf.Exploit.Agent-36062. The presence of U3D content and extracted JavaScript files suggests a multi-stage exploit. The primary attack vector appears to be leveraging a CVE-2007-5659 vulnerability to run malicious code.

Heuristics 6

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)
U3D/3D content in PDF — Adobe Reader 3D parser CVE-family indicator high CVE related PDF_U3D_CVE_RELATED

PDF contains U3D (Universal 3D) or 3D annotation content — CVE-2011-2462 and CVE-2009-3953 are critical vulnerabilities in Adobe Reader's U3D processing that allow arbitrary code execution. U3D content in PDFs is extremely rare in normal documents.
ClamAV: Pdf.Exploit.Agent-36062 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36062
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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `068944f8c011a88ab770b45c6de142b9305a1f515d410204d5eadd9ac2b5bfb3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A2	373 bytes
`legacy_pdfkit_stage_000.js` `ae5ebe1704aaa6111a6c233cba4b56b4cb756d46d87fd5bb2996dd7474615a1f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FC	13525 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `ca587ab940067cef621c5654f757748e945eec3c85fb9770d096d5bbf6f5cc90`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FC	5670 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`u3d_00_off000036c1.bin` `48816569ab4f370009a917ef6429edbe09e4dfe8a63b00a0a0f75a904c62ba94`	pdf-3d-stream	PDF U3D 3D stream at offset 0x36C1	27449 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.99, consistent with packed or encrypted content.

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