PDF / .TXT malware analysis — malicious · 487ce91eecb6647f

MALICIOUS

PDF / .TXT

12.7 KB

MD5: e71ffee72921d943faba20a8b3c1352e SHA-1: c357e94c3bb7828bbfa17764c0b657eed504ee72 SHA-256: 487ce91eecb6647f37904502a0bd282ab16cc17bed84a99615a8f76bd24dfee3

78 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability by using the Collab.collectEmailInfo method. This JavaScript is designed to deobfuscate and execute further stages, indicated by the extracted files 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js'. The overall intent is to download and execute a secondary payload, typical of a multi-stage attack.

Heuristics 4

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)
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` `422958d96bb8c6f621f890fd6d6163701d00e7f47a633c608c1a40567ed05a50`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	12327 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `bbad32d1411fc87184b0f4a360246a14662e1a7d4da0432786e17b2373f9fb5e`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	5144 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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