PDF malware analysis — malicious · 427283caac1cb1c2

MALICIOUS

PDF

12.3 KB

MD5: ae6386419a31993027d012cd2f4de77a SHA-1: 13ec83f781555fc58c39cc86efe29ce300d8acec SHA-256: 427283caac1cb1c2725db4fab8096d0e347bdefc498b5678f916da4da7305b6d

138 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains embedded JavaScript, specifically identified as exploiting CVE-2007-5659 via the Collab.collectEmailInfo method. This JavaScript is further deobfuscated into two files, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js. The presence of these scripts and the ClamAV detection (Pdf.Exploit.Agent-36062) strongly indicate that the document is designed to execute malicious code, likely for downloading and running a secondary payload.

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` `943a82cdbf7d62ad6082e8d20d2785e3fd75860bb7eee4b32e67bbfeacaae423`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12051 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `f9f9d67e729431364758b333cb86bea7ab4bc3d15ff591cd1a939e17e29fc988`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5000 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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