PDF malware analysis — malicious · f550497f11b4bd4a

MALICIOUS

PDF

11.7 KB

MD5: 03cb6375a18c39c89b9288e7f6d0fbbd SHA-1: e5a5fb3f76aa9a712200253d6159a6b1959c51ae SHA-256: f550497f11b4bd4ac3f85f0ac35c4af2e1263dc6671a4e713f09f0632b3dd0ec

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The file is a PDF containing embedded JavaScript, identified as malicious by ClamAV and triggering critical heuristics related to CVE-2007-5659. The JavaScript action, specifically using 'Collab.collectEmailInfo', is a known technique for exploiting PDF vulnerabilities. The embedded JavaScript streams were deobfuscated into two files, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, indicating a multi-stage exploit. The primary attack vector appears to be the exploitation of the CVE-2007-5659 vulnerability.

Heuristics 5

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.Exploit.Agent-36065 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36065
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_obj0007_000.js` `9c67560e8c63b720885d3efc1627b844b86a6ec08e99e5b65a22eae832045756`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19C	431 bytes
`legacy_pdfkit_stage_000.js` `3fd324b232c1775b1453ed4fbaee35fcff9499cf0221a9ad6fea792d2c2ef602`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	11894 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `57637882b0a1f4c12e421937f88119a20254c1058238daad70615acd7932df84`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4909 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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