PDF malware analysis — malicious · e2d41b53832591e2

MALICIOUS

PDF

9.1 KB

MD5: 1e2b85e643479d34f481cfb97b0978b6 SHA-1: a32551b91f54b6ea4f7ecc6e2fd2a8d759fc90d3 SHA-256: e2d41b53832591e24cad112aaed8b1fc52becffb4ac79d5f6466c05d157189d9

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that is obfuscated and utilizes the unescape function, indicating malicious intent. The critical heuristic firing for CVE-2007-5659, specifically the Collab.collectEmailInfo method, confirms the exploitation of a known PDF vulnerability. This exploit likely leads to the execution of further malicious code, as suggested by the ClamAV detection as Pdf.Exploit.Agent-35905. The presence of multiple JavaScript streams and the specific exploit technique point towards a downloader or exploit-laced document.

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` `a323d87d8c0cd09b65d1ec42c95c42d555c0a6d439005c650540c31cf2be1ebd`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	12091 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` `a6733d17be1a3da7f48e9bf114afe00602c7a90e4d2ce23ed8e8ffa70aa29b60`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	4991 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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