PDF malware analysis — malicious · 8d8f4ba5a457e016

MALICIOUS

PDF

12.6 KB

MD5: 066afe5e933461f0a9ff8dc91c1a9a32 SHA-1: ff2708ae6ffd5c7cae14201dc55f96a9a797495d SHA-256: 8d8f4ba5a457e01616ad7aa4da779d58214c1c8d48b28a7cf529a11077d28f04

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The file is a PDF containing embedded JavaScript, triggering critical heuristics for CVE-2007-5659 (Collab.collectEmailInfo) and ClamAV detection (Pdf.Exploit.Agent-36062). The JavaScript is heavily obfuscated but appears to be part of a multi-stage exploit chain, with extracted files named 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js' suggesting further deobfuscation and execution. The primary attack vector is the exploitation of a PDF vulnerability to run malicious code.

Heuristics 5

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-36062 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36062
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` `068944f8c011a88ab770b45c6de142b9305a1f515d410204d5eadd9ac2b5bfb3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	373 bytes
`legacy_pdfkit_stage_000.js` `e2cd6d4be553524fe02831297a022adfff3cd4bfa7eb7a971575ee576242c7bb`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12247 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `dd3cd4830c4437a9ab1ac802fd68890fb673f813bc785989fa839df0d9e05c40`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5097 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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