PDF malware analysis — malicious · d730c77f71e250a4

MALICIOUS

PDF

118.7 KB

MD5: a0ea697178e873d9cdd41151cf2c8e52 SHA-1: 547f2ec27759dd0faea9fb736923308bad1e4f91 SHA-256: d730c77f71e250a40c240dd59da2c53907a9e8a93de48bef98a3bc518c70bee0

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF contains embedded JavaScript, with high-confidence heuristics indicating the use of eval() and a large comment-padded JavaScript eval stager. ClamAV also detected this as 'Pdf.Exploit.Agent-36086'. The obfuscated JavaScript streams suggest the primary purpose is to download and execute a second-stage payload, which is a common technique for malware delivery.

Heuristics 7

ClamAV: Pdf.Exploit.Agent-36086 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36086
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
Large comment-padded JavaScript eval stager high PDF_JS_LARGE_COMMENT_PADDED_EVAL

PDF JavaScript contains a very large stream padded with long random-looking block comments around String.fromCharCode and eval. This is an exploit-kit obfuscation shape used to bury a decoder and recovered stage inside noise, not normal PDF form automation.
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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_obj0006_000.js` `33467f47ad4c286922ae02d6970ab56a3451a3cc1e5f9d8cdf2f597001435f5e`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	626983 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 42 long base64-like blob(s).
`stream_001_off0001d725.bin` `3bf0ffe334764b91d537c059f388c800d97579e9a42dca04d732f52f7d11b027`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1D725	300 bytes
`legacy_pdfkit_stage_000.js` `043a7ce9de601936c1846b5c4938bc9dedaffc9f4ba7e4c8ff81b7ae21f7cff6`	deobfuscated-js	double percent-decoded annotation JavaScript at offset 0x143	262144 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 626 long base64-like blob(s).

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