PDF malware analysis — malicious · d7687a17ae44b664

MALICIOUS

PDF

12.0 KB

MD5: cc931f72956969050eb1714f5bc00b2c SHA-1: d8759eda6c569afdd8cac683e943cc6905df92c5 SHA-256: d7687a17ae44b66495ef74ee67b3f69eb5270337b762e8b23f8f02d3833bce41

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The file is a PDF containing embedded JavaScript, which is flagged by multiple heuristics including CVE-2007-5659 for its use of Collab.collectEmailInfo. ClamAV also identifies it as Pdf.Exploit.Agent-36079. The embedded JavaScript streams are heavily obfuscated, but the critical heuristic indicates the exploit likely involves concatenating info fields and evaluating the result. This suggests the PDF is designed to exploit a vulnerability to run arbitrary code.

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` `b896bb349b65b8a8b8a56190079d1036a43871c26749e2f7c56ed3daaa2cd373`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	12636 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `2d6ced7707979670037eab2fa83194265b41ecd5445d50d14f2b75306818d051`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	5180 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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