PDF malware analysis — malicious · f356bdeb7a283df1

MALICIOUS

PDF

11.9 KB

MD5: f50f396578e7cd8035228d986df6de8c SHA-1: 5defc0e87d2294fd641f0c96de89ecedcf3d1e17 SHA-256: f356bdeb7a283df18d81aef497c6ec8630327633aa1f679bcad3af427a33e808

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 (Pdf.Exploit.Agent-36065). Heuristics indicate the exploitation of CVE-2007-5659 via the `Collab.collectEmailInfo` JavaScript function, which is used to construct and evaluate a script. This process likely involves downloading and executing a secondary payload, as suggested by the presence of deobfuscated JavaScript files named `legacy_pdfkit_stage_000.js` and `legacy_pdfkit_stage_001.js`.

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` `21e8afb177cf10fc00329116b8773f89b6a44ff3bde6bf9e5aabeb5878ffcc26`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12293 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `46e25e55b6df669a04cfe158717683f389065f0040cb7d2547da5ac97ad13d51`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5079 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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