PDF malware analysis — malicious · 28ec601575181817

MALICIOUS

PDF

12.1 KB

MD5: cf3dbee6ca86beb8ea87123ca4382b04 SHA-1: 16bb50014422113b2177b9cec209e4cd3c7d00f8 SHA-256: 28ec601575181817c2b44271331d192a3cdb27749d394260949d52a50840a1e3

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The file is a PDF containing embedded JavaScript, identified as malicious by ClamAV and triggering critical heuristics related to CVE-2007-5659. The JavaScript is obfuscated and likely intended to download and execute further malicious content, as indicated by the extraction of deobfuscated JavaScript files. The specific exploit targets the Collab.collectEmailInfo method.

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-36062 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36062
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` `068944f8c011a88ab770b45c6de142b9305a1f515d410204d5eadd9ac2b5bfb3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	373 bytes
`legacy_pdfkit_stage_000.js` `b4dddf3131eb65c58469186cff49d1fb375f05cc303fbb44324c9fe8de11a2d9`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12042 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `3fb94799c17999c246a639d8c6c7b11b3ed298bd283765677c46170a6c2f4ab7`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4908 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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