PDF malware analysis — malicious · 1d2a9e3995f1e3e0

MALICIOUS

PDF

11.7 KB

MD5: de758952f999c5bef933cccc8a6258dc SHA-1: 2eb475240ce50b498aee9ab7874d3abd33d09aa7 SHA-256: 1d2a9e3995f1e3e0448d068beb4b8dfda68147d83884d486563ad6667168b9e9

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious File

The file is a PDF containing embedded JavaScript, identified by multiple heuristics including 'PDF_JAVASCRIPT' and 'PDF_JS'. The critical 'CVE_2007_5659' heuristic indicates the exploitation of a known vulnerability related to the 'Collab.collectEmailInfo' function, which is used to construct and evaluate JavaScript. The presence of deobfuscated JavaScript files ('legacy_pdfkit_stage_000.js', 'legacy_pdfkit_stage_001.js') further supports the execution of malicious scripts. The ClamAV detection 'Pdf.Exploit.Agent-36065' confirms its malicious nature. The primary attack pattern involves leveraging this exploit to run arbitrary code, likely for downloading further malware.

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` `bda11cad5e5cd3e60e029a52b2085cc215a8c3364d0e77da50b8d248a5721eb6`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12088 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `548d79411e13cdbfadeb04af3e5f80b69ddab23aeffcd75bd310c984f709e6dc`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4951 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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