PDF malware analysis — malicious · 4aa95d140497a5cd

MALICIOUS

PDF

13.3 KB

MD5: bd13186e2613bd2ba6078a36131470bf SHA-1: b8f7602c796829315aeea777ab0fc189e866c716 SHA-256: 4aa95d140497a5cd3d26b21a279f545366d2dae9d07d91241266273077c267ab

138 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

The PDF file contains embedded JavaScript that exploits the CVE-2007-5659 vulnerability, specifically using the Collab.collectEmailInfo method. This JavaScript is likely designed to download and execute a secondary payload, as indicated by the presence of deobfuscated JavaScript files named 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js'. The ClamAV detection of 'Pdf.Dropper.Agent-7212170-0' further confirms its malicious nature as a dropper.

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-7212170-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7212170-0
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` `bedd676af9bf2e3ca07f9e3a10d07bc561e9745801f30653ef176c0c1e7620a3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	336 bytes
`legacy_pdfkit_stage_000.js` `0f9ebce289f50ee987d5f741fd5b026f54028f5bd4cfbbf0a6e6250b4fec1437`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2EC	12445 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `6aa6f00274574defc5e4511b986b00fcf72fe18e689e492234587cb60f02e630`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2EC	5182 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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