PDF malware analysis — malicious · 9638ac1509f83cf3

MALICIOUS

PDF

12.0 KB

MD5: a6e5cc6604492968d7eedd45f608fdd0 SHA-1: 5af8ea76534f0135cce6c5d849a8186632a1c3c8 SHA-256: 9638ac1509f83cf3151d2aa82c990c87ce1b0af78ecfb60963c4eee2a61a5e55

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by multiple heuristics and flagged as malicious by ClamAV. Specifically, the CVE-2007-5659 heuristic indicates the use of the 'collab.collectEmailInfo' method, a known vector for exploiting Adobe Reader vulnerabilities. The deobfuscated JavaScript files suggest a multi-stage process, likely involving the download and execution of additional payloads. The extracted artifacts and exploit indicators point towards a downloader or initial access 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` `8a49d5068fb2d22215912c33164e77085dd96b62e9e5636b6907535033b7c283`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12202 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `fd90f959cfec54798fc4b445c5ed5b713e5e9cc90164dcc7a7a3192edf4cdad2`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5024 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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