PDF malware analysis — malicious · 3c8dd91714866303

MALICIOUS

PDF

13.0 KB

MD5: 120ed5e9301fbc72bd1fc0ac735f41bc SHA-1: d893848184fe1c0b821d6bb934399ce786cd528b SHA-256: 3c8dd917148663033ce4e7e84af73241fefb8b2934c9f3255bcbbe59c50b855b

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2007_5659 heuristic indicates the use of a known vulnerability (Collab.collectEmailInfo) to execute JavaScript. This script is likely responsible for downloading and executing a second-stage payload, as suggested by the ClamAV detection of 'Pdf.Dropper.Agent-7251965-0' and the presence of deobfuscated JavaScript files. The exact payload and delivery mechanism are not fully discernible from the provided evidence.

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.Dropper.Agent-7251965-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7251965-0
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` `1847af0a099665b6ac45af66402e56ed64237a1b287618ee3d6643267fda6f35`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	343 bytes
`legacy_pdfkit_stage_000.js` `e0aeace9ff77e916cc3d2944f6c966cdfa3bc935c72871933aa4f20992ae5e16`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	12592 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `124d45737431c75cbbfb918081d4cc5906e821adbecc96f9ee6bd959f4d9f577`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	5295 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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