PDF malware analysis — malicious · df272eca0624b925

MALICIOUS

PDF

11.7 KB

MD5: e1ec9284ed6be0dc888e23602bf009a1 SHA-1: 0d92844dccfa0ba84ee4202f2984646c18c03187 SHA-256: df272eca0624b925e23d120ca3fd5e0912d566f4f8fc209a02b01193009dfc52

138 Risk Score

Malware Insights

MITRE ATT&CK

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

The file is a PDF containing embedded JavaScript, identified by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. A critical heuristic, CVE_2007_5659, specifically mentions the use of 'collab.collectEmailInfo' to execute JavaScript, indicating a known exploit technique. The ClamAV detection of 'Pdf.Exploit.Agent-36065' further confirms its malicious nature. The embedded JavaScript streams, deobfuscated into 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js', likely facilitate the download and execution of a secondary payload, which is a common attack pattern for this type of exploit.

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` `985a1552a059388dd323b68e6c2d32b135ef37f5d7368ba2ada1aff9f070230d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12003 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `f1e93c53895452b8aed3233bf4af6e60eef4f27f1cf2a2eff25300ea7d07d485`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4901 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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