PDF malware analysis — malicious · d057ab3c124478c7

MALICIOUS

PDF

8.6 KB

MD5: 0154f7b7bdee69d611dfcdd137509424 SHA-1: 4235939d2598a0956e8202d6d644ffa8e12f6930 SHA-256: d057ab3c124478c75434b273d2efa81b0cc458860a5e817abf56cfb3066a334c

108 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF sample contains embedded JavaScript, identified by the CVE-2007-5659 heuristic which specifically targets the Collab.collectEmailInfo function. This JavaScript is likely used to download and execute a second-stage payload. The ML classifier strongly indicates malicious intent. No specific family could be identified, but the attack pattern is consistent with PDF-based malware delivery.

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` `7128309785befd1fdc9f80f8cb957318aa662bb4abbabc6f3e1eaf12099e064e`	pdf-javascript-stream	PDF /JS object 1 at offset 0xF	50 bytes
`javascript_obj0013_001.js` `0cb50b9e2914c81d81e402246c0dd0bd088a55cc7636a30bf8f75feb3f66f98d`	pdf-javascript-stream	PDF /JS object 13 at offset 0x37B	16607 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 long base64-like blob(s).
`legacy_pdfkit_stage_000.js` `f79269064cc9a013da1f0d4f6bd8e284f8bd2e186b3353c354a92a7f1ef6d02c`	deobfuscated-js	reverse-string concatenation decoded JavaScript at offset 0x37B	680 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` `8c5ae9f592ad53ec12a84435ceb8c34740819e3d15cc49c204753f4b66d21be4`	deobfuscated-js	reverse-string concatenation decoded JavaScript at offset 0x37B	685 bytes
`legacy_pdfkit_stage_002.js` `65f23055f6b5f970c6a31a369ea2dabf7644bd031a34173f31285b1fdfef27b7`	deobfuscated-js	reverse-string concatenation decoded JavaScript at offset 0x37B	671 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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