PDF malware analysis — malicious · e57941acd171a37d

MALICIOUS

PDF

12.5 KB

MD5: aebb64c71c4080647c09b093bf18ddab SHA-1: 03d757c02e25764e9da79cec1b4a0eb2a5d25875 SHA-256: e57941acd171a37dc3c9a353c3d77c2632bf2e936b166c748d3fa9b9415d5259

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript, identified by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. A critical heuristic, CVE_2007_5659, specifically points to the use of Collab.collectEmailInfo to execute JavaScript, indicating an exploit attempt. The ClamAV detection of 'Pdf.Exploit.Agent-36065' further confirms its malicious nature. The embedded JavaScript, particularly the deobfuscated stages legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, likely facilitates the download and execution of additional malicious content, a common technique for malware delivery.

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-36065 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36065
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` `9c67560e8c63b720885d3efc1627b844b86a6ec08e99e5b65a22eae832045756`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19C	431 bytes
`legacy_pdfkit_stage_000.js` `c9ed318900ab58434a92aa19fc0b0b0ab054005b84a0f8d23c6b53de83a1026e`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12847 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `4d592be6607deeded332596bc617dd493781ccfed9c08b2134981685c91ec0d6`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5349 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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