PDF malware analysis — malicious · b5fdd00b1d2723d6

MALICIOUS

PDF

11.8 KB

MD5: 0dfb97723bb414624391afec71ef4202 SHA-1: b9d8b3499844e2e765dabd1146fa6437290d3c2d SHA-256: b5fdd00b1d2723d60f21d8051eddf4bf076fe28851fc460edd7fb085a1acccd7

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript, identified by the CVE_2007_5659 heuristic, which targets the Collab.collectEmailInfo function. This exploit is designed to deobfuscate and execute further JavaScript stages, as indicated by the extracted files legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js. The primary intent appears to be the download and execution of a second-stage payload, typical of exploit kit delivery mechanisms.

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` `3a7752a5d4d1175c7840615cba27284b068375274b108115608aef8fb36d3935`	deobfuscated-js	z-percent hex-pair decoded JavaScript at offset 0x2E8	5002 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` `6a7b863f8a0127352b1dd61750c436ec2fa03b276901edabe4fa14e574d7b9b8`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2E8	11911 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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