PDF malware analysis — malicious · 7668bbe2f1482f84

MALICIOUS

PDF

11.8 KB

MD5: c437332a302ba4ba4b0bd6c0f0e36a40 SHA-1: 945fc9b5a4409e365dc4121e03b790547a5bd96f SHA-256: 7668bbe2f1482f8435659367dcdea6e3fa87e802f848d1885b450fa647142c13

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, triggered by the 'Collab.collectEmailInfo' method, which is associated with CVE-2007-5659. This exploit is designed to execute arbitrary JavaScript. The presence of deobfuscated JavaScript files ('legacy_pdfkit_stage_000.js', 'legacy_pdfkit_stage_001.js') indicates a multi-stage attack, where the initial PDF likely serves as a dropper for further malicious code. The exact nature of the second stage could not be determined due to the complexity of the deobfuscated scripts.

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` `f6f5ef7fba9fb10c4bf87a88398c4c935d87150b5f7750b4494721c691997715`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12062 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `d5434e6915a637acd4c79068dec2ea78c5b19a9aeccffa2d72170cf4c2244bd8`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4961 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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