PDF malware analysis — malicious · 91e831c3918f2386

MALICIOUS

PDF

12.4 KB

MD5: eeb1fbd1d2e5bfb3f853434296a2450a SHA-1: 0ee2e255aab3687ac65d2a0c9c3b41e04e59c30e SHA-256: 91e831c3918f2386c4332edfd3168a43940432e10ae5030f8e30342d8b6642e2

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious File

The file is a PDF containing embedded JavaScript, identified as malicious by ClamAV (Pdf.Exploit.Agent-36062). The critical heuristic indicates exploitation of CVE-2007-5659 via the Collab.collectEmailInfo function, which concatenates and evaluates JavaScript. This suggests the PDF is designed to download and execute a secondary payload. No specific family could be identified, but the exploit vector is clear.

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` `eb8671f29b52e10f8604593e045f1d075fa7a33807ff2386b95509da87b6afe0`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12133 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `5be0e3f010a248609a57f5f505d45f76a696e0cf091b9b588773ec79f5059cc7`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5004 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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