PDF malware analysis — malicious · 9064a0cc13635dcd

MALICIOUS

PDF

166.3 KB

MD5: d8df23612cda9d1b0a3951923db27278 SHA-1: 997cf6b47f4f36793e7925b2a10395b03f0b9563 SHA-256: 9064a0cc13635dcd1f5bc008384e6ee7b07a2fb980b05e3dd1212080af82c9f6

258 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

This PDF file contains embedded JavaScript that exploits CVE-2007-5659 and CVE-2008-2992, as indicated by the critical heuristic firings. The extracted JavaScript streams, particularly 'legacy_pdfkit_stage_001.js', suggest the execution of a secondary payload. The presence of ClamAV detections like 'Pdf.Exploit.Agent-36307' and 'Js.Exploit.Shellcode-18' further confirms its malicious nature. The script's likely intent is to download and execute further malicious code.

Heuristics 7

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)
util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992

PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (identified after JavaScript deobfuscation)
ClamAV: Pdf.Exploit.Agent-36307 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36307
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
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_obj0008_000.js` `7bd148c675df2df2b23ec5945a231d44dd83673752eab507bd68653bfd3e3393`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	2572 bytes
Detection ClamAV: Pdf.Exploit.Agent-36307 Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_000.js` `c36078bad75a9cc27a7d5e85a7cf250806dc96dfdf1c36f31c2486d6b51256cc`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xC27	4318 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `8fdd6df2cd820fe4a019f87628057dc18903b269d24ba62a37435b0e2bdfcf72`	deobfuscated-js	double percent-decoded annotation JavaScript at offset 0xC27	18555 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 11 eval/decoder/string-building token(s).

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