PDF malware analysis — malicious · ac8602dbc431fc33

MALICIOUS

PDF

11.7 KB

MD5: 4180e6bfd3b002634a645a168414ae92 SHA-1: 033697ebac75a1cb7337258dba5388ca971d41f1 SHA-256: ac8602dbc431fc33abd2c271469563ada8e88c0a7acc8ecb29f7ca33ecd9ed80

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious Link

The critical heuristic CVE_2007_5659 indicates the exploitation of a vulnerability in the PDF reader using JavaScript. The embedded JavaScript streams, particularly 'legacy_pdfkit_stage_000.js', are likely responsible for the malicious execution. The PDF structure and the presence of JavaScript actions strongly suggest an exploit delivery mechanism.

Heuristics 6

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-36079 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36079
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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` `ef8bdac794684ae9cd4eb7091d80e1c5ca478c06c639d72d01626c1f7ce78b6d`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19C	578 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `a282ea0fc595a2cdea6038f1aa9084e52858db6d121fb9439fcb476dc890d724`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	12127 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `ab34c188fb9de232a768c93e85f0021e9f745b7a811f96588aedba8dca64e85f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	5011 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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