PDF malware analysis — malicious · b6244e12f3d5ecf4

MALICIOUS

PDF

12.8 KB

MD5: bc3eaafa26513f6419ec7b7445f953c9 SHA-1: babfcf6cc59d07591b0351ab008c9da262eefab7 SHA-256: b6244e12f3d5ecf4732d6fd82c1a35b0e4c3fd5a3801c4fa91db0a775f1bea46

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The file is a PDF containing embedded JavaScript, identified by multiple heuristics as malicious. Specifically, the CVE-2007-5659 rule indicates the use of a known exploit targeting Adobe Reader's JavaScript engine. The extracted JavaScript streams, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, are likely responsible for downloading and executing a secondary payload, a common technique for initial access.

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-36064 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36064
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` `a5c8f0f722df4dd9876a0087e1eee65bd3020c5995f94f6729f7e17f3f3677a0`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	331 bytes
`legacy_pdfkit_stage_000.js` `785c203b63966d6b4ce0c4b65d2c740c416d3147504ea7453a5323179b45bfad`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F2	11732 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `5df24915426ed060d276496b0300a63cbdaa420d8698adc2e5a91fb44f8f64c8`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F2	4952 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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