PDF malware analysis — malicious · 2ed11e15e74f08a3

MALICIOUS

PDF

12.7 KB

MD5: 1bd20c394d4bcad9cda28cc209eec3aa SHA-1: 81d4522952860352a4ce2f5bfc33e36205b96e59 SHA-256: 2ed11e15e74f08a3e4b79ec1fce79c7d3c5af220c03815ddab4000c6db817be8

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 exploitation of a known vulnerability (Collab.collectEmailInfo) to execute JavaScript. This JavaScript is further obfuscated and split into multiple files (legacy_pdfkit_stage_000.js, legacy_pdfkit_stage_001.js), suggesting a multi-stage download and execution process. The ClamAV detection (Pdf.Exploit.Agent-36062) confirms its malicious nature. The primary attack pattern involves leveraging this exploit to deliver 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` `e993e867b7346d2a37a3045b7be9b543901fe0fd01637f11521e57edbf7447a6`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12367 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `f4e4edc47df628e47b77f5d60d51acc50a80bac21497fedf2b21cfdca4d294f1`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5121 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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