PDF malware analysis — malicious · 279ec03608cc82a5

MALICIOUS

PDF

12.3 KB

MD5: 3470255352194b93eef05e7561334909 SHA-1: 0c3796fa57e548391c8ecf661635003757daecad SHA-256: 279ec03608cc82a564a8ca59019dbefaa6cbb4e172bd96e7bb8c0580da828ec1

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/Script Execution T1204.002 Malicious Link/URL: User Execution

The critical heuristic CVE_2007_5659 indicates the exploitation of a vulnerability related to the 'collab.collectEmailInfo' JavaScript function within the PDF. This function is used to launch embedded JavaScript, which is further confirmed by the PDF_JAVASCRIPT and PDF_JS heuristics. The extracted JavaScript files, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, suggest a multi-stage process, likely involving the download and execution of a secondary payload. The ClamAV detection further supports 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` `c3185444affb60297480deded78fc6ac96e392f11e2932e73aac6a977db89d2d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	11999 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `4610e87d2aa10cfba8956e1bcd27a148e87d8de34bf0a0eb7711836ae0d1218c`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4907 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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