PDF malware analysis — malicious · e11b53f8e19691ff

MALICIOUS

PDF

11.8 KB

MD5: 94c6790fe85a2f5d5a1d02d1c238795e SHA-1: c9ad5dde62a983cad004d4c143ad29d82f549e4c SHA-256: e11b53f8e19691ff799d1bc7fbd1d68079688ddee0fd37d0f00973345e60b6cb

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.001 Malicious Link/Object T1071.001 Web Protocols

The file is a PDF containing embedded JavaScript, which is known to be used for exploiting vulnerabilities. Specifically, the CVE-2007-5659 heuristic indicates the use of a known exploit targeting PDF readers. The embedded JavaScript streams, particularly the deobfuscated ones, likely contain code to download and execute further malicious content, as suggested by the ClamAV detection signature 'Pdf.Exploit.Agent-36079'. The document body is unreadable binary data, providing no contextual clues.

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` `2e807fc4e7bb1da0d3dea2b18282822250659b398a43451dabf8ed49fdec981a`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	12305 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `89ef2c4ea9c0e8e99127c2e6d788ef84903849bd2a676ca4a69d04ccbaaa3ea1`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	5085 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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