PDF malware analysis — malicious · 1c2f55b9914c5133

MALICIOUS

PDF

12.2 KB

MD5: 183e5993084226d11e694ab0d6ea08de SHA-1: 0ebe035e3cd725086aba02d766224391a05f50c1 SHA-256: 1c2f55b9914c5133dae84a7d7d328ad6f3df34aef39732682ff7bb6a7eafd9a7

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The file is a PDF containing embedded JavaScript, identified as malicious by ClamAV and triggering critical heuristics related to CVE-2007-5659. The embedded JavaScript, found in legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, is likely responsible for executing the exploit and downloading a secondary payload. The obfuscated nature of the JavaScript and the use of a known exploit indicate a downloader or initial access stage.

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-36062 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36062
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` `068944f8c011a88ab770b45c6de142b9305a1f515d410204d5eadd9ac2b5bfb3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	373 bytes
`legacy_pdfkit_stage_000.js` `607f4693f734ed0bbf40fc3ad6e9467f1584492457d475466fc83f6d649fe1eb`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	11942 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `f630039c85bb95fa4f436303b8595fbb8c1304e28a732b65da4bdcbbafe4ccab`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4861 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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