PDF malware analysis — malicious · 86b8a43fb1031d98

MALICIOUS

PDF

12.6 KB

MD5: 463bed8d61eb3161ce096351e7722680 SHA-1: 2bda113b7b7ad23f7f9f836c05b4245480db8da7 SHA-256: 86b8a43fb1031d98cf4a53a39a42e5e2576622b6b27237029b84b0ee3aa88f3f

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The critical 'CVE_2007_5659' heuristic specifically points to the exploitation of a known vulnerability using JavaScript to collect information and likely execute further code. The presence of deobfuscated JavaScript files ('legacy_pdfkit_stage_000.js', 'legacy_pdfkit_stage_001.js') suggests a multi-stage attack. The ClamAV detection 'Pdf.Dropper.Agent-7279142-0' further confirms its malicious nature as a dropper.

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.Dropper.Agent-7279142-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7279142-0
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` `1847af0a099665b6ac45af66402e56ed64237a1b287618ee3d6643267fda6f35`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	343 bytes
`legacy_pdfkit_stage_000.js` `f769204cab00cb5631544063fbceb3307eaee65f517b26b3b5722a8a100554bd`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	12302 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `7f97a5832e22c424fff51fe40ff1f41dea0c3391274a8d6d8fda97f4ba2d713e`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	5057 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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