PDF malware analysis — malicious · b6c313956659987e

MALICIOUS

PDF

9.5 KB

MD5: 74cefe1cca06d5c255302a6cbd191410 SHA-1: c3e7dc760f9b189f4b70069265aaa37b8b0c789d SHA-256: b6c313956659987e8792bfdb757424b1c527b31c29c9776b45763f5a9804600d

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1559.001 Component Object Model T1204.002 Malicious File

The PDF file contains embedded JavaScript that is obfuscated and utilizes the unescape() function, indicating malicious intent. The critical heuristic CVE_2007_5659 specifically points to the exploitation of a known vulnerability (Collab.collectEmailInfo) within PDF readers. This exploit likely serves as a dropper or initial access vector for further malicious activity.

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-35905 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35905
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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.
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` `d8a6b4ad1abf04d0c4a4f89535cfb57f7312edef25c443f4e844c8ec9d0929dd`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	352 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` `d4082b9135dbe4062320d04dde4c6192a76c5b5303b676ecf5bcfe433cabbf29`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	12160 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `b40d9cdb920ae8213061094804219d4db8a260f8973407b11db2360e2d6f120f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	5086 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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