PDF malware analysis — malicious · a3ae1a440eac871d

MALICIOUS

PDF

11.9 KB

MD5: fceedbf5cc6a9623668fb8e6d01fd692 SHA-1: f5bff0d83bbb6a86876943173d54f1e938974f2b SHA-256: a3ae1a440eac871de32ee7b2cb3328bb4531bcd11fc6c1a98d65cd7bd8eb2cea

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' function. Static analysis indicates this JavaScript is designed to download and execute further stages, as evidenced by the extracted 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js' files. The ClamAV detection further confirms its malicious nature. The exact payload and delivery mechanism beyond the initial exploit are not fully discernible from the provided evidence.

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` `b72c98f0a0e02959524a7bab19bc2b6c98be9fe8451445b1502c770f01241c65`	deobfuscated-js	z-percent hex-pair decoded JavaScript at offset 0x2E8	5012 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` `e51c6798372a30c9fd4903005004c0e9e18085be7dd753b662d9822fc9b7ff3f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2E8	11941 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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