PDF malware analysis — malicious · 2d27848643c4381f

MALICIOUS

PDF

12.4 KB

MD5: ce1ae966ee7167c452f05a5b025e9046 SHA-1: 45883e40d72c995b7a175b9bfe9a053026153a08 SHA-256: 2d27848643c4381f612ca277c36df66f23b2a6ff02b5bd63c60355d988c5d4b9

146 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File Execution: Malicious File T1059.001 Command and Scripting Interpreter: JavaScript

The PDF file contains embedded JavaScript that exploits CVE-2007-5659 using the Collab.collectEmailInfo sink. Static analysis recovered two deobfuscated JavaScript files, 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js', which likely contain the second-stage payload downloader. The presence of these deobfuscated scripts and the specific CVE exploit indicates a malicious intent to compromise the user's system.

Heuristics 6

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-35903 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35903
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.
syncAnnotScan annotation-staging primitive low PDF_FOXIT_SYNCANNOTSCAN

PDF JavaScript calls syncAnnotScan() — a no-op annotation-enumeration primitive used by exploit-kit JavaScript to stage payload reads from annotation /Subject fields before eval(). Not a vulnerable sink itself; rarely seen in legitimate PDFs. (matched in decompressed stream)
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` `860eae5f96eb426380281c575a089242b50523bbb4bbb8dd765e582cd9c07d2e`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	294 bytes
`legacy_pdfkit_stage_000.js` `bb8dadd7147bd2b3dec0b919fa720f1def4beae6d5c892549a3ffe80a1ff67e2`	deobfuscated-js	z-percent hex-pair decoded JavaScript at offset 0x2E8	5316 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `38c438cc0344dc37274efc5b8c741cdedfa4ab09e01d2d413cfa581c9d5874d4`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2E8	12460 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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