PDF malware analysis — malicious · 9312939ed6a22fb9

MALICIOUS

PDF

11.8 KB

MD5: ae91dd0e222fb5e458093652cd5bdb59 SHA-1: 39ae90ad02b3747e8889278638ad21fff3405a03 SHA-256: 9312939ed6a22fb90fa7d689ee6170ce0ff1b480125203e94139889ad26713ec

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious Link/URL

The PDF file contains embedded JavaScript, specifically leveraging the 'Collab.collectEmailInfo' method which is associated with CVE-2007-5659. This exploit is designed to execute arbitrary JavaScript, which in turn is likely used to download and execute a second-stage payload. The presence of multiple obfuscated JavaScript streams further supports this malicious intent. The ClamAV detection 'Pdf.Exploit.Agent-36079' confirms the malicious nature of the file.

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` `621550cca276ffec96524a1485e5c2983177e974406a8b4397c92fb1ed6813e4`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	12239 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `539a6265705ab49abfc6fdf2452c31c1545efe28ee4871983f89c1b9cc9bb3e2`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	5010 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.