PDF malware analysis — malicious · 986763ae4f57413b

MALICIOUS

PDF

12.9 KB

MD5: d5fba7f3bf16cacdb652fc5eed12ceac SHA-1: 62bc9269e02d636edb275bd4a311a7e370c9a14a SHA-256: 986763ae4f57413b719bf237550afd1a89234e59001b4fb3cfa668f11d7918ff

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The critical 'CVE_2007_5659' firing specifically mentions the use of 'Collab.collectEmailInfo' and JavaScript exploitation, suggesting a known vulnerability is being leveraged. The presence of deobfuscated JavaScript files ('legacy_pdfkit_stage_000.js', 'legacy_pdfkit_stage_001.js') further supports the execution of malicious scripts. The ClamAV detection ('Pdf.Exploit.Agent-36062') confirms its malicious nature. The overall attack pattern points to a PDF-based exploit delivering a secondary payload via JavaScript.

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` `60d859521a556618b7c866b227c1d21b30a0b930e1af0b63c7e43fc66716d191`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12583 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `4614ebb9ebad978a0425988caa137ccbdc7307ca593599d82a5a7b87cada8836`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5235 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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