PDF malware analysis — malicious · 417ae5a408576aa1

MALICIOUS

PDF

44.7 KB

MD5: 8e8e3e3345c54ca24eaa979304462329 SHA-1: 389d034cac4ccbdfd2de227cc7d9fd3ebc593902 SHA-256: 417ae5a408576aa12449b347d2868799299819ba8693da4eb1d14aeea6c801ca

126 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell

The PDF sample contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The critical 'CVE_2007_5659' heuristic specifically points to the use of the 'collab.collectEmailInfo' JavaScript function, a known vector for exploiting Adobe Reader vulnerabilities. The embedded JavaScript, particularly the 'legacy_pdfkit_stage_000.js' and 'deobfuscated.js' files, is likely responsible for downloading and executing a second-stage payload. The presence of U3D content also suggests a potential exploit vector.

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)
U3D/3D content in PDF — Adobe Reader 3D parser CVE-family indicator high CVE related PDF_U3D_CVE_RELATED

PDF contains U3D (Universal 3D) or 3D annotation content — CVE-2011-2462 and CVE-2009-3953 are critical vulnerabilities in Adobe Reader's U3D processing that allow arbitrary code execution. U3D content in PDFs is extremely rare in normal documents.
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_obj0009_000.js` `13e428efbba6d9f497c253ef53ac3f08561c5f9f3f489b4e0fd8def3952ba1fd`	pdf-javascript-stream	PDF /JS object 9 at offset 0x4971	539 bytes
`legacy_pdfkit_stage_000.js` `035a2d27d3d91b5126e814cfb1238e844b34a2d61a4752ee18103d4689ca8cba`	deobfuscated-js	z-percent UTF-16BE base-21 decoded JavaScript at offset 0x1D43	5809 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`deobfuscated.js` `a140022e61e9581d6636d465af90be1d6d0daef1c671cefadb80d5d85daa179b`	deobfuscated-js	PDF JavaScript deobfuscation pass	322557 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 long base64-like blob(s).

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