PDF malware analysis — malicious · 92140f87a99c32ae

MALICIOUS

PDF

11.8 KB

MD5: 0dea025d382d7e8dc01245fbcc403793 SHA-1: 81c43c7a2b6af0350962f20692b45c55fd9cf6da SHA-256: 92140f87a99c32aeed48c28472915efa96ab72e2c3dd55dfdaa6fbbf6acca494

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious Link

The file is a PDF containing embedded JavaScript, which is a common delivery mechanism for exploits. The critical heuristic 'CVE_2007_5659' indicates the use of a known vulnerability to execute this script. The script itself is heavily obfuscated, but the presence of 'String.fromCharCode' and the 'Collab.collectEmailInfo' method suggests it's designed to deobfuscate and execute further malicious code, likely downloading a second-stage 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` `a311225ff9a7713611875f7f90eab47b94287a2a09097b3d939342b4b272baa5`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	12154 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `09af3d6ef2eae4e3517dcfa5e3a596b45ba1e65456c5ab7ecb119418561d63f1`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	4999 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.