PDF malware analysis — malicious · c3e8ed489414d580

MALICIOUS

PDF

12.8 KB

MD5: 3d253bfebc350039268d93489cab5a2a SHA-1: f2d8df139b51b69c5081c0c540e45493676f75d8 SHA-256: c3e8ed489414d58091ce2540b2a1ace20c622f317b58bc2fe8e47dd656d0fc21

78 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1059.001 PowerShell

The PDF file contains embedded JavaScript that exploits CVE-2007-5659 via the Collab.collectEmailInfo method. This JavaScript is designed to download and execute a second-stage payload, as indicated by the presence of deobfuscated JavaScript files named legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js. The overall purpose is to compromise the user's system through a drive-by download attack.

Heuristics 4

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)
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` `1847af0a099665b6ac45af66402e56ed64237a1b287618ee3d6643267fda6f35`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	343 bytes
`legacy_pdfkit_stage_000.js` `8a1faec6f45f0dcfae984f5b43319e2f68507f7211db730988f1011391b59b96`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	12471 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `911213d307c2ef1be334944a609c936e2201b21ed86c1a4e1c6eaaca5680ef92`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	5174 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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