PDF malware analysis — malicious · e4ec129231532902

MALICIOUS

PDF

12.3 KB

MD5: b0dae46377b8dff3ccc5625232d20370 SHA-1: 5d4677de0447cb57829033bba930b480099f59ca SHA-256: e4ec129231532902e1572d35e421977a871cd11f97a0f8e365ee15cbf43d7799

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability in Adobe Reader. Static analysis identified obfuscated JavaScript streams, with one heuristic specifically mentioning the 'Collab.collectEmailInfo' sink and indicating encoded exploit stages. The presence of deobfuscated JavaScript files ('legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js') suggests a multi-stage attack. The primary intent appears to be the execution of this JavaScript to download and run further 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` `92b7d22a36d829d958357f5a7ac1ad2491eeb1365107f3e2e39eff0c564c5a4e`	deobfuscated-js	z-percent hex-pair decoded JavaScript at offset 0x2E8	5221 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` `e7f13b64e0d73b3b089f806f321924b198bed712ddb783d50a4c26210a319bc3`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2E8	12449 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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