PDF malware analysis — malicious · 3f3f4e789503d050

MALICIOUS

PDF

12.2 KB

MD5: bb8938a394eaa09bae165f27ea26fb45 SHA-1: a5ffefdd69e71e892c382e567f2895f30176219b SHA-256: 3f3f4e789503d0506d430812b56f23d9fca713421f640be1225dcd4657e4a37f

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by multiple heuristics including CVE-2007-5659, which exploits the Collab.collectEmailInfo function. The JavaScript is further obfuscated and extracted into separate files. This indicates the PDF is designed to exploit a vulnerability, likely to download and execute a secondary payload. The specific exploit and obfuscation techniques suggest a downloader or dropper functionality.

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` `7e561213f1c4aff817384393d9dc1bb75b2f5101dc1c3832926ace5af72d0ffb`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	11833 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `a82e993204289208a9d1197f9328649ea64ad7f25fb6cb0098d1c2183703a8fe`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4843 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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