PDF malware analysis — malicious · 5946cb2c9c69a92b

MALICIOUS

PDF

11.8 KB

MD5: 8a19c08f1ee2f6d015e060b63d1a3c99 SHA-1: 91b609f567f279139c5a98c62286ee2f7725617d SHA-256: 5946cb2c9c69a92bd932e22dabf1f9650d3d2c849fe4ec2bd418f819fa8d0a8a

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that exploits CVE-2007-5659 via the Collab.collectEmailInfo sink. The heuristic firings indicate that the JavaScript is encoded and likely serves as a loader for further stages, as evidenced by the extracted JavaScript files 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js'. The primary function appears to be downloading and executing additional malicious content.

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-35903 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35903
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.
syncAnnotScan annotation-staging primitive low PDF_FOXIT_SYNCANNOTSCAN

PDF JavaScript calls syncAnnotScan() — a no-op annotation-enumeration primitive used by exploit-kit JavaScript to stage payload reads from annotation /Subject fields before eval(). Not a vulnerable sink itself; rarely seen in legitimate PDFs. (matched in decompressed 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` `860eae5f96eb426380281c575a089242b50523bbb4bbb8dd765e582cd9c07d2e`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	294 bytes
`legacy_pdfkit_stage_000.js` `ebf6f4600afd0492d69c0a63b3132cf425b26eaf2a8570879f05718b4f17266b`	deobfuscated-js	z-percent hex-pair decoded JavaScript at offset 0x2E8	4972 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `f5209ad13aa1777e1a53bb41b905a96e972e0f447b6f5a6b03664b0c75cbd605`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2E8	11809 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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