PDF malware analysis — malicious · c5c7f7791f442e20

MALICIOUS

PDF

12.7 KB

MD5: a8821ece40f3d5f9a25828ae496cf2bd SHA-1: 582ff0f6740dd2a79a49c6c745aab6d513e410f3 SHA-256: c5c7f7791f442e20bc4f793ba58729dd321ed558ca4a3901c45d9531124c458d

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. The critical CVE_2007_5659 heuristic indicates the use of a known exploit technique involving the 'Collab.collectEmailInfo' method to execute JavaScript. This script is likely designed to download and execute a secondary payload, as suggested by the extracted JavaScript files and the ClamAV detection of 'Pdf.Exploit.Agent-36062'.

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` `d5ed8ec488c3bac22adc560ac609d3b2477745f8eaff30933e9a103fee2057a7`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12372 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `d4b5697b0053bc0531fbfd16afebf5c65d2d8f40d5ee913579a676e894cd129b`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5080 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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