PDF malware analysis — malicious · 58e4a68bc234a4c8

MALICIOUS

PDF

12.4 KB

MD5: ad94b1058363a712d260b86deb4113cd SHA-1: 155f8d2bb76ada904647a025dbc03da1ed5403ba SHA-256: 58e4a68bc234a4c8b4980df577e03f953e57cb0790ef0cebe0f97ad1c40591ce

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that exploits CVE-2007-5659 via the Collab.collectEmailInfo method. The heuristic firings indicate that the JavaScript is obfuscated and likely serves as a dropper for further stages, as suggested by the presence of deobfuscated JavaScript files. The ClamAV detection name 'Pdf.Dropper.Agent-7262805-0' further supports its role as a downloader.

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-7262805-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7262805-0
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` `f3439bc48185beeb4178449d47c7f684176242d8115d2ddb4f309c48962b7829`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	12066 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `f31e661de6a63c46a9c5e881d02212fc7d8a619c3e260cd546ebacfc3b4405bd`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	4970 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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