PDF malware analysis — malicious · 48fe690e0f570a47

MALICIOUS

PDF

12.6 KB

MD5: b357574d82ff6e86aa14fdd79c6eddf6 SHA-1: 3cff5e6896de9c6f6caf32b1470370c51c38be10 SHA-256: 48fe690e0f570a4701a79f3faaaa14d57e3a606d4bdf6a7b5b7de20667a76648

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2007_5659 heuristic indicates that the sample exploits a known vulnerability (Collab.collectEmailInfo) to execute JavaScript. This script is likely designed to download and execute a second-stage payload, as suggested by the presence of deobfuscated JavaScript files named 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js'. The ClamAV detection further confirms its malicious nature.

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` `2b927f3982ff89f296d5c88241b481a6220c9eae3877158828234cae5ba28315`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12313 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `9949fba1d9ceabc9a87ba579a636507bb3c2d4b9e5c09018437337bfbb3926e7`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5069 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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