PDF malware analysis — malicious · 7bb1f77f1d1468cc

MALICIOUS

PDF

12.3 KB

MD5: c12ef17f51d0e050fdb83cbf94275c1c SHA-1: 19537ea63f146d5358e21007dca63e9828692206 SHA-256: 7bb1f77f1d1468cc4580b5a106859c906d87ffa441a0aade1ca9f89ed1e2c818

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The file is a PDF containing embedded JavaScript, identified by heuristics as exploiting CVE-2007-5659 via the 'collab.collectEmailInfo' function. This function is known to be used in PDF exploits to execute arbitrary JavaScript. The extracted JavaScript streams, particularly 'legacy_pdfkit_stage_000.js', suggest a multi-stage process likely involving the download and execution of further malicious content. The overall pattern indicates a downloader or initial access exploit.

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` `f3278d7b46d466fe7a1a4d8ef31c9a55f5f2668412afce69c41a320822a1ba6c`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12009 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `987cdbe976f0b6b39145649839c4c74a8b72b799c1ba029a2dce921a504d84d2`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4914 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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