PDF malware analysis — malicious · c24d8cf2bd913f6d

MALICIOUS

PDF

12.1 KB

MD5: e5e2d7cf9fc5e4458dec92024a7d5a4b SHA-1: e3bb54e60929839cf6785247f306e47d74ec005f SHA-256: c24d8cf2bd913f6d45d386d27c8bb5ccfd5edc5f3bb0e3d9b879fd380f7d264c

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

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 exploitation of a vulnerability using 'Collab.collectEmailInfo' to execute JavaScript. This JavaScript is likely responsible for downloading and executing a second-stage payload, as indicated by the presence of deobfuscated JavaScript files ('legacy_pdfkit_stage_000.js', 'legacy_pdfkit_stage_001.js') which are typical of exploit kits. The ClamAV detection further confirms its malicious nature.

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` `4de29ad32b401c260719a8b1440baf6d03fee15f72d5f52bb01feeeee1332767`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12472 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `a64977d00b93921a4d2864ca9462519903ffc9a98e9dc4f41e065459d644c09f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5188 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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