PDF malware analysis — malicious · bb26a1b69985bf3e

MALICIOUS

PDF

12.4 KB

MD5: 25c064a3000d516b450892a0c6a2c596 SHA-1: 774018ee4673a8412a50e7c784f254dcb04b40c6 SHA-256: bb26a1b69985bf3e93a1a41abed13576daf012c1f07e3ea197efa084fc90a7be

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1071.001 Web Protocols

The PDF file contains obfuscated JavaScript that exploits CVE-2007-5659 via the Collab.collectEmailInfo function. This JavaScript is designed to download and execute further stages, indicated by the extracted files 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js'. The primary attack vector is the exploitation of a known PDF vulnerability to deliver a multi-stage 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: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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` `6f60a1053baafdc578f85eae84a2dc6d16775fbd66240d82cbfb7b4f4ff4e90a`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	295 bytes
`legacy_pdfkit_stage_000.js` `2406910cf5b226ee7d159e37c391ac6c830af82d76fa76ca721aefc702708d90`	deobfuscated-js	z-percent hex-pair decoded JavaScript at offset 0x2E9	5281 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` `5a78dab2af9058b3eb8c8e1180f59ce9dc15b524acc03a9c8415c1fbd2a713cc`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2E9	12635 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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