PDF malware analysis — malicious · 9bd9c929c2db57ba

MALICIOUS

PDF

12.7 KB

MD5: 0472615c322d894e8fa3e3375678f2a9 SHA-1: a212464d7db838aa2ec54f0c004b80b50390b647 SHA-256: 9bd9c929c2db57ba6b2005e7de7a9789505bfcf8c13b8c88386650b1cc195174

78 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2007_5659 heuristic indicates the use of a known vulnerability to execute this JavaScript. The extracted JavaScript files (legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js) suggest a multi-stage process, common for downloading and executing further malicious content. The exact payload is not discernible from the provided evidence, but the exploit chain is clear.

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` `4b086fff852b41521962c71664ed3ac745023e006cb355cfb5abd43cf916a71e`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	12411 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `d854bedfe996a9a5122931be0638f2c5f02b1983be823636563b9ece8ba93774`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	5128 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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