PDF malware analysis — malicious · 45e983dc58cf5679

MALICIOUS

PDF

11.7 KB

MD5: ff8e30c4e219b968cd98769e46066df8 SHA-1: 90da0f9f1c9a814b930597227711e8c5166fd99c SHA-256: 45e983dc58cf56798a73a844fefc5587fe8adab41de08860ffe717552b85a1a0

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability via the 'collab.collectEmailInfo' method. This JavaScript is further deobfuscated into multiple stages, indicating a downloader or exploit loader. The primary function appears to be executing malicious code, likely to download and run a secondary payload, as suggested by the ClamAV detection and heuristic firings.

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` `b8de6fbfca39aed05745e85db4ac2f1687acf154ec981f5a4d063dd283bd2407`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12005 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `77407d9da1880201f3a80e0ae207b0197358ee0c5ef2d6d21ff051f36b18d9b2`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4946 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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