PDF malware analysis — malicious · 4afcf9639f15abbf

MALICIOUS

PDF

11.9 KB

MD5: 7e70a1d3c34d3fbd9066d6339f84c572 SHA-1: 68485e9c1ba6c8447335b714ed346df6d7c4437a SHA-256: 4afcf9639f15abbf994767d8346ae8816e1a0b205328fc5be55b7cb683f2f569

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains embedded JavaScript that utilizes the 'Collab.collectEmailInfo' method, a known indicator for the CVE-2007-5659 vulnerability. The JavaScript is obfuscated using String.fromCharCode and appears to be designed to download and execute a secondary payload. The presence of multiple deobfuscated JavaScript files further supports this. The ClamAV detection 'Pdf.Exploit.Agent-36079' also indicates malicious intent.

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` `e29b7757faac86fb81b05a6cb9340140d3848d3faa5b414f1c87d77da80bbe01`	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` `5d98b1aa99520d21aaf2e8c38e8327a0f217547aa1499ab2ff01e1500ff1ad30`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	5055 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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