PDF malware analysis — malicious · f0339f20a1fe7187

MALICIOUS

PDF

12.2 KB

MD5: 18d5734e35265f106fc573fbadd1b1d0 SHA-1: 7deede958392d392685ca611b1b25ac2f792a5d2 SHA-256: f0339f20a1fe718750c3e969e7c2125cebf40e1cc1f3c057337a1319adaf1e6e

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The file is a PDF containing embedded JavaScript, identified as malicious by ClamAV and triggering critical heuristics for CVE-2007-5659. The JavaScript is further deobfuscated into two files, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js. This suggests the PDF is designed to exploit a known vulnerability to execute malicious code, likely for downloading and executing further stages of an attack. The exact payload or C2 infrastructure is not directly evident from the provided artifacts.

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` `b5fafd3485efaaba93935cf0d4802b9e8f54bf13d608afb2edc6dc122eb07a6d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12588 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `b05978fe51588e4b68229a5f814be84abab7bd3fe35341d23c4d40cbbf7874e7`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5188 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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