PDF malware analysis — malicious · e16e501d6a1f78c4

MALICIOUS

PDF

12.8 KB

MD5: fce8725f6bc8c17419b730d468b71264 SHA-1: 26e0b3528091f70b9a3dc2b7b09aa71670616c4d SHA-256: e16e501d6a1f78c44f334c4168e50665db06f860440b827f7c1a5b6a6182c63f

138 Risk Score

Malware Insights

MITRE ATT&CK

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

The file is a PDF document that contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2007_5659 heuristic indicates the exploitation of a known vulnerability in Adobe Reader via the Collab.collectEmailInfo method. This JavaScript is responsible for downloading and executing a second-stage payload, as suggested by the suspicious extracted JavaScript files and the ClamAV detection of 'Pdf.Exploit.Agent-36064'. The embedded URL heuristic also points to malicious content within the document body.

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-36064 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36064
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` `a5c8f0f722df4dd9876a0087e1eee65bd3020c5995f94f6729f7e17f3f3677a0`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	331 bytes
`legacy_pdfkit_stage_000.js` `dec89b259503a89db2b98449fe061627db3e0414510bafb7cc1097a79fcddd4c`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F2	11899 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `8e743f5c897df9d6011551b118e96c4633935ae33399e6d10dcd5d67454a5047`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F2	4960 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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