PDF malware analysis — malicious · 5928c446e8f56e1d

MALICIOUS

PDF

11.6 KB

MD5: f030025d7d8751f7ba147baf79be99ee SHA-1: debec6347218dea6a1ad4a997a1bcdfae065d903 SHA-256: 5928c446e8f56e1db8c58e1efb5d50cac0e3e5aab0d0ca6f0483f3d62be48150

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell 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 deobfuscated JavaScript files and the critical heuristic firings strongly indicate that the PDF is designed to execute malicious code, likely for downloading and executing 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-36065 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36065
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` `9c67560e8c63b720885d3efc1627b844b86a6ec08e99e5b65a22eae832045756`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19C	431 bytes
`legacy_pdfkit_stage_000.js` `77b62088b5f5d155a939cdf74e9e8dd7f83ee29ec767f254d8b9880e067a4e22`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12022 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `413d7dd807761796b052b46eda8a5135854c9d24bd050766a72f31fbf0855c3d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4917 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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