PDF malware analysis — malicious · e52cd47ef5af994f

MALICIOUS

PDF

9.6 KB

MD5: 897cf03179df8b004e1cb7ebd17d1390 SHA-1: 975ef0280ad793f737208e8f190f7a3de2c6bdbf SHA-256: e52cd47ef5af994f0b94a505ddfb7e0b052e91de13fe2f49eb738d0df7a25722

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell

The file is a PDF containing embedded JavaScript, which is being exploited via the CVE-2007-5659 vulnerability. The JavaScript is heavily obfuscated, but the presence of `unescape()` calls and the ClamAV detection signature `Pdf.Exploit.Agent-35905` strongly indicate malicious intent. The script likely downloads and executes a second-stage payload.

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` `184ee024da27977f5a9b36bb553bf1fc938f586f46e715b8159e57299051689a`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	12333 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` `9f70d996db200983fa2ea49d095d7c71dba9bf0d14ad993ce9dd3367d421ae2b`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	5176 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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