PDF malware analysis — malicious · cb0ebe86d194d4fc

MALICIOUS

PDF

12.8 KB

MD5: c29bc31d439d21f221384fd0cc6f4d6a SHA-1: 757fcd29d88b5e8bdf715c091536ce6215a9b1f6 SHA-256: cb0ebe86d194d4fc8b770de982dfc9b5f379ec207a0ad29ac6387093ce7b553f

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious Link/URL

The PDF file contains embedded JavaScript, specifically identified as exploiting CVE-2007-5659 via the Collab.collectEmailInfo method. This indicates an attempt to leverage a known vulnerability to execute arbitrary code. The presence of deobfuscated JavaScript files further supports the malicious intent, likely to download and execute a second-stage payload. The ClamAV detection as Pdf.Exploit.Agent-36062 confirms the malicious nature.

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-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 3

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 0x19B	373 bytes
`legacy_pdfkit_stage_000.js` `11d4a817bb7faf8781d5a309878e68c49f04f943e06978a07d7f902cc88ab601`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12446 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `ebd212dc3d23555cca04f12f77a6d3d1a4a86d0c45c35c816af26e51462e1180`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5191 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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