PDF malware analysis — malicious · 2b68c43741fa2f60

MALICIOUS

PDF

12.4 KB

MD5: f00536c6779d59afccb4abdcad5e65b6 SHA-1: a7415dc06b8ed4066a9c7924a6ee87ec40f9f648 SHA-256: 2b68c43741fa2f60d3372eba9a89ad7f3513cd2db06cb089c9a45db976b07635

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that exploits CVE-2007-5659 using the Collab.collectEmailInfo method. This JavaScript is further obfuscated and split into multiple files, indicating an attempt to conceal its malicious actions. The primary function of the embedded scripts is to download and execute a second-stage payload, as suggested by the heuristic firings and the nature of the extracted JavaScript files.

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` `159dd4ba9fa0da1e9458a14b3c35cc38acbfe38427d96b0670a3d21c83ab5c02`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12094 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `20ee965bd265ad2708aae8d29c3d0207ced5f21a326148c77f4712d1e719d71d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5005 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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