PDF malware analysis — malicious · b7b6dc8c55a614c8

MALICIOUS

PDF

12.2 KB

MD5: d1f957de185f498957efc45b6981beb2 SHA-1: 29539df8b60cf360f6698dd95120ab6e74d306a9 SHA-256: b7b6dc8c55a614c8e7292651c6ef0e4257253b83ef2e406732022c13934bb10b

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, flagged by multiple heuristics including a critical detection for CVE-2007-5659 related to the 'Collab.collectEmailInfo' function. This function is known to be used in PDF exploits to execute arbitrary JavaScript. The deobfuscated JavaScript files suggest a multi-stage process, typical of downloaders that fetch and execute further malicious content. The overall pattern indicates an exploit delivery mechanism.

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-36065 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36065
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` `9c67560e8c63b720885d3efc1627b844b86a6ec08e99e5b65a22eae832045756`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19C	431 bytes
`legacy_pdfkit_stage_000.js` `30b4f3ab5d3a1c0289a9998f8385dc4e369b73cd36052e6375cb7aeccc6253ad`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12493 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `a21fbb9dc435bff02963c13877e12127cc853ca834f74d2da2aba3ccc2304a74`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5210 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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