PDF malware analysis — malicious · 555e5d12c88293db

MALICIOUS

PDF

11.9 KB

MD5: c283e1f6b3e6b3b0901cffce23acc46c SHA-1: 3fb0190dbdcd4cf6ef64f640cb61f12fce00a65f SHA-256: 555e5d12c88293db396549b25f3a6fa0a113388a31966ac536dca033be2194cc

138 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.001 Malicious Link: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell T1059 Command and Scripting Interpreter

The PDF file contains embedded JavaScript that exploits CVE-2007-5659 using the Collab.collectEmailInfo method. The heuristics indicate that this JavaScript is likely used to download and execute a second-stage payload, as evidenced by the extraction of deobfuscated JavaScript files. The specific exploit and the nature of the embedded scripts suggest a downloader or initial access stage for further malicious activity.

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` `2a0563d00d0cd9c8893b8191d9e6cd4b6b3b4ecb5a8890135dd2a94129ea2cdc`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12160 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `4dfa6e575d5faac14b82e61c2550a907a4a808b001341ef6ede407768d1d0893`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5066 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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