PDF malware analysis — malicious · 9c3562ce9774b875

MALICIOUS

PDF

12.2 KB

MD5: adf84297475bc6ef56f2eeaa1f115a63 SHA-1: cfa51d96b3060f75da89212cbf9aac9b75dba982 SHA-256: 9c3562ce9774b875133f29f8007a7b0076e79d05f885c2be52c7a0ffe1fcb76f

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. The critical CVE_2007_5659 heuristic indicates the use of a known exploit targeting PDF readers via the Collab.collectEmailInfo function to execute JavaScript. This script is likely responsible for downloading and executing a second-stage payload, as suggested by the suspicious extracted artifacts named 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js'. The overall attack pattern is consistent with a malicious PDF used for initial payload 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` `72ec6015771c689236e5787e587a9568aebd4e9f2abffab40ab721d88d52478e`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12583 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `a8164a12e89c7f86abc2be53b4448cefd593cbd44bcc01265ac103905c4a553c`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5210 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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