PDF malware analysis — malicious · 35560436fd099189

MALICIOUS

PDF

9.5 KB

MD5: 87c7193674f77710c78466102b5350b4 SHA-1: 8d248b58319bfef6d3430d90832f9395099da5c0 SHA-256: 35560436fd099189c9470b83f417a0403f0339240cb99b8e21f565fca0c5cf0a

180 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

The PDF file contains embedded JavaScript that exploits CVE-2007-5659, as indicated by the 'Collab.collectEmailInfo' heuristic. The JavaScript is obfuscated but ultimately decodes to a payload that likely downloads and executes a second-stage file. ClamAV also detected this as Pdf.Exploit.Agent-35905, confirming its malicious nature. The primary attack vector is the exploitation of a known PDF vulnerability.

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` `a9d618ef7d360b3f68909c5640f5dbf68c1142ae03f8358b0894a368f94f8557`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	12174 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` `bbcfd7af3aae42cc45c453770cfe8b91231fd9c35c26286faa57e6827abcbbd5`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	5093 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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