PDF malware analysis — malicious · e8eeee81116514ef

MALICIOUS

PDF

11.6 KB

MD5: c692cbb0b218dd65616d5cac2c0553c7 SHA-1: 653fe1044f594d9cc224b5cfb012a8d9dfbad24a SHA-256: e8eeee81116514ef1d0004c402cf25ab2494e0bd66e68f63369743588aaf0d3d

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious Link

The critical heuristic CVE_2007_5659 indicates exploitation of a known PDF vulnerability using JavaScript. The embedded JavaScript streams, particularly legacy_pdfkit_stage_000.js, are heavily obfuscated but appear to be designed to download and execute additional malicious content. The ClamAV detection further supports the malicious nature of the file. The document body is unreadable, so the rationale relies on the script and exploit heuristics.

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` `363763b086f50e3da3b98ba06ed381081d97966a166a7a37583b01fc54fe747b`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	12041 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `e29e60b5d2bbb6e46216f6c7f17b5926a206462e532bee08dbe8c01fdfbfec6b`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	4914 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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