PDF malware analysis — malicious · 3ee6d3bd0718e899

MALICIOUS

PDF

9.5 KB

MD5: a36001db685baedb07cc1d76e545019d SHA-1: 9cf63baa5691c574727006b9551699c7de4dd441 SHA-256: 3ee6d3bd0718e8993d0fd938376daf4afa6a1cc157394996e231f3e84309d138

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. A critical finding is the CVE-2007-5659 exploit targeting the Collab.collectEmailInfo function, which is used to decode and execute JavaScript. The presence of deobfuscated JavaScript streams suggests the script's purpose is to download and execute a secondary payload, aligning with common PDF-based malware delivery techniques. The file is flagged as malicious by ClamAV with the signature Pdf.Exploit.Agent-35905.

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` `82ac7f9f9d92be2ae924c2110988f5a9b484a0b923ef485c592aa3ac808ca58e`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	12037 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` `fc39eff64450299a3803b6db3ede4cf08f2678740ffade503bd1dd0b903cc873`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	5032 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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