PDF malware analysis — malicious · 7bbbb45f13724898

MALICIOUS

PDF

13.0 KB

MD5: 1f0a5e30aac8a69a7de89535e07d18da SHA-1: 9ddf1a4af04043dbc42cb647c3112bbf3a096dc1 SHA-256: 7bbbb45f137248982cf4f4a5a22c669c00503afaf63ec866b195bcf3064b8c46

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File: User Execution: Malicious Script

The critical heuristic CVE_2007_5659 indicates the exploitation of a PDF vulnerability using JavaScript. The embedded JavaScript streams, particularly 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js', are likely responsible for downloading and executing a secondary payload. The ClamAV detection 'Pdf.Exploit.Agent-36062' further confirms the malicious nature of the file.

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-36062 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36062
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` `068944f8c011a88ab770b45c6de142b9305a1f515d410204d5eadd9ac2b5bfb3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	373 bytes
`legacy_pdfkit_stage_000.js` `f60833cd97305f4a2fd17089ea5e9f868c8c4783fb1b373e88bd2f79d2593197`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12798 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `c5cf97562a817153cb4a4411bc1b42798eff227e1acaf99c9ba5b9a5b456804d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5340 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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