PDF malware analysis — malicious · b089bee157bcbd83

MALICIOUS

PDF

13.0 KB

MD5: b696b3415db9099d68e139b14ea8c4e9 SHA-1: c7cd143f794caf3deb65ccba9f69276babecc76e SHA-256: b089bee157bcbd83affb872aad00697ba210c1e2e192a461de089d8a0b51fbf6

78 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2007_5659 heuristic indicates that the JavaScript is used to exploit a known vulnerability (Collab.collectEmailInfo) to execute arbitrary code. The extracted JavaScript files (legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js) likely facilitate the download and execution of a secondary payload, although their specific actions are not fully detailed in the provided evidence. The attack pattern is consistent with a PDF-based exploit delivery mechanism.

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` `547273732ed17356fdb86cf3ff5bb872c630339132061ccfd2ac1de302fcb5cf`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	12765 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `f6b941bbd75482f368f8ddb3516dffd46f02005c31d2841bea2fc72289a72f8f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	5288 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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