PDF malware analysis — malicious · 59c8ac26ba02c07d

MALICIOUS

PDF

12.5 KB

MD5: 175f0e321be50f20255c34131937d18f SHA-1: 22f66cb046992553fc69ffae6a71d7a2914e4a31 SHA-256: 59c8ac26ba02c07d0d81317ddd27cc030f3ce6ec9be3386e8207ce1dad56e33b

138 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1059.001 PowerShell

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability (Collab.collectEmailInfo) to execute malicious code. The critical heuristics indicate this is a dropper, and ClamAV detection confirms it as Pdf.Dropper.Agent-7263085-0. The deobfuscated JavaScript streams, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, likely facilitate the download and execution of a secondary payload, a common tactic for droppers.

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-7263085-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7263085-0
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` `a4a5b6b557d0b9440c8e30af16f326feb60b81b7fdc609698c8bf251030702dd`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	12276 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `cea834220ffc044aebb783324de4bf43f9953f3c6ad6cda253e3e45c9e8c7fac`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	5065 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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