PDF malware analysis — malicious · 976a036d4b45aa72

MALICIOUS

PDF

1.95 MB

MD5: ce5f89b5441c91d1044b63cfab72579e SHA-1: 1f8f28a7a9165f739ca3b6b98c366baafe7a5ebe SHA-256: 976a036d4b45aa72c0384cba504a5c879a4cd930fc18839d8f1ae9ce5aa8743c

108 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious File

The PDF file contains embedded JavaScript, triggered by the CVE-2007-5659 vulnerability related to Collab.collectEmailInfo. Static analysis recovered deobfuscated JavaScript streams, indicating the sample's intent is to execute malicious code. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to deliver a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0001_000.js` `54b823c66bf0cdbeec11eb9e7f3eb04d02db004cb286b08c78209b92f9b09d9a`	pdf-javascript-stream	PDF /JS object 1 at offset 0xF	37 bytes
`javascript_obj0013_001.js` `e1c735ec368f7648d6351708dcfeaf9261abc0c0eef43cc7111d392f17623088`	pdf-javascript-stream	PDF /JS object 13 at offset 0x361	17136 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 long base64-like blob(s).
`legacy_pdfkit_stage_000.js` `0f6c421ec7ef0b80c35cb0287c6078a1c7657399765915dc610add3ba05127dd`	deobfuscated-js	reverse-string concatenation decoded JavaScript at offset 0x361	769 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `3dae10a7456ac4f6bf416a772242211dcfec9bf1e1d92863a3ee6d5e2a22e30a`	deobfuscated-js	reverse-string concatenation decoded JavaScript at offset 0x361	765 bytes
`legacy_pdfkit_stage_002.js` `492a67204c3b072620834e58d596177c8ffd56e3d86045d656a9cb510ea70d6a`	deobfuscated-js	reverse-string concatenation decoded JavaScript at offset 0x361	509 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.