PDF malware analysis — malicious · 2e393b0ac507e453

MALICIOUS

PDF

12.3 KB

MD5: 56502e3d01f28d2687d94839fa06cbf9 SHA-1: e3d2ef7bc89593e09a6574260cbc76907ceb98b8 SHA-256: 2e393b0ac507e453200f95f8e837eb0688404ec7eca75ab4bc247c7980395078

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.001 Malicious Link/URL T1059.003 Windows Command Shell

The critical heuristic CVE_2007_5659 indicates the exploitation of a known vulnerability in Adobe Reader (CVE-2007-5659) via embedded JavaScript. The JavaScript stream is heavily obfuscated, but the heuristic suggests it's designed to collect email information and then execute further code. The presence of multiple extracted JavaScript files further supports this. The primary goal appears to be the execution of arbitrary code, likely for downloading and running a secondary payload.

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` `f5700d3ead9b63e64325ff3daddaaf9779919a2297559429823de1d31d2bfb62`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	12841 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `dfef3fce8977f801a05767107d0aa145aabe134a2e30f286dc952d43662465cd`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	5346 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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