PDF malware analysis — malicious · 44212bba4be193c1

MALICIOUS

PDF

11.9 KB

MD5: 44fd22117ed9a6aa59dd7b1a1157ebe1 SHA-1: eedc5cc1ddf3600012d7c23b2c9f300ac6a2ecac SHA-256: 44212bba4be193c1fa764c6fe50699a17c4f48f5788bdec0e32a6cf215481ccb

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF file contains embedded JavaScript, specifically leveraging the 'Collab.collectEmailInfo' method which is associated with CVE-2007-5659. This exploit is designed to execute arbitrary JavaScript within the PDF viewer. The presence of multiple obfuscated JavaScript streams and a ClamAV detection for 'Pdf.Exploit.Agent-36079' strongly indicate malicious intent, likely to download and execute a second-stage payload.

Heuristics 6

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-36079 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36079
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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` `ef8bdac794684ae9cd4eb7091d80e1c5ca478c06c639d72d01626c1f7ce78b6d`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19C	578 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `4e6aa6afe8cb3260e39f956d5d9863999fe9c34496303eb0cba04c298d2d41c7`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	12371 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `66e3a4bc6937af1848355e3d411481ab97e7f4abc7a6bd7b79702f973e20d005`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	5110 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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