PDF malware analysis — malicious · 47191f439d6f67b7

MALICIOUS

PDF

9.3 KB

MD5: 27162cd512a4e522148609c700532cec SHA-1: dfe879e1dd5dd265f5a103f790f15dd0613f9966 SHA-256: 47191f439d6f67b729994878cf8785efbc56aab1486a4b4aa1943a06a17aa6d4

180 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that exploits the CVE-2007-5659 vulnerability, as indicated by the 'Collab.collectEmailInfo' heuristic. The JavaScript is heavily obfuscated but ultimately decodes to executable code. This exploit is designed to download and execute a secondary payload, as suggested by the ClamAV detection name 'Pdf.Exploit.Agent-35905'. The presence of multiple deobfuscated JavaScript files further supports this. The attack pattern is consistent with a PDF-based exploit delivery mechanism.

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` `b096adc78ffb9af06bb99fa19f9fe78414abd9b1e421616c10525d528b6cb969`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	12146 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` `d74f1e199c30cf1ab5daf1f760476f59ed48df6ddc1047556eed11cb1bf07732`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	5079 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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