PDF malware analysis — malicious · 7a1b14cbd566e259

MALICIOUS

PDF

12.5 KB

MD5: a0d2cf9a8fe5c7b3edaa01bc1ce4ff3d SHA-1: 053c0c76c634d94c4e384cf9efc249e868872ff6 SHA-256: 7a1b14cbd566e2598a811e0cd30ddd6c235441d527449d4de6b84ca7baaecc5f

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1071.001 Web Protocols

The PDF file contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2007_5659 heuristic indicates the exploitation of a known PDF vulnerability using the Collab.collectEmailInfo method to execute JavaScript. This JavaScript is likely responsible for downloading and executing a second-stage payload, as suggested by the ClamAV detection of Pdf.Dropper.Agent-7275254-0 and the presence of deobfuscated JavaScript files.

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-7275254-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7275254-0
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` `9a7e04767bd41e3085db3b13eacbf13f5c4f2401073f7bafc9a2a0bc48c924a8`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	12175 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `f8f4a3890d932638294af2131cbea6e5c172d0156c4467ff9862d9e02eecf052`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	5029 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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