PDF malware analysis — malicious · af3b80b89bac83f8

MALICIOUS

PDF

11.6 KB

MD5: c93b6e9bedf5199d5084c3cf8ab5dde5 SHA-1: fb51c7a5b33c517ffebcb84e98c69c30f5dd8a90 SHA-256: af3b80b89bac83f8cf5324f4ba9c021b8a9ad8118262ac980fdb63a7a27fb5ca

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that leverages the 'Collab.collectEmailInfo' method, a known vector for CVE-2007-5659. This exploit is designed to execute arbitrary JavaScript, which in this case is used to download and execute further stages. The presence of deobfuscated JavaScript files ('legacy_pdfkit_stage_000.js', 'legacy_pdfkit_stage_001.js') indicates a multi-stage attack. The ClamAV detection 'Pdf.Exploit.Agent-36065' further confirms its malicious nature.

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` `733e7739b24f82d597c1039f78e9086baf73f52a7eacdfc9278bdd135f96d4dc`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	11972 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `d5a9164fb1631a152af439403a388560cd2b684120c7137c33aa9fb775b81a7f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4879 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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