PDF malware analysis — malicious · e7c3aa3c6545498c

MALICIOUS

PDF

31.4 KB

MD5: 5a9cc3226931914eecaa1fbd2627c97a SHA-1: 55ceb7452de6d5d8dba0ccc61e13db26555ef2a9 SHA-256: e7c3aa3c6545498ce2bf0c67558df4626e8cc737ec6007251a0cf05ed2d90daa

106 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains embedded JavaScript and a Flash object (TyPWoIJRMY.swf). The presence of eval() calls and embedded scripts suggests an attempt to execute arbitrary code. The extracted JavaScript files, particularly 'legacy_pdfkit_stage_000.js', likely contain obfuscated code designed to download and execute further stages, potentially exploiting known PDF vulnerabilities. The overall goal appears to be the delivery of a malicious payload.

Heuristics 6

RichMedia (Flash) high PDF_RICHMEDIA

PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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.
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
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
`TyPWoIJRMY.swf` `767382813fc770c9716554c3266b22eee1636037ca964af05acf6ff66db4a27d`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x12B9	26993 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.98, consistent with packed or encrypted content.
`javascript_obj0006_000.js` `578409545f892305f7cd944bc962b2b04d5a5db74bf73d46b1a0f44bf2eff091`	pdf-javascript-stream	PDF /JS object 6 at offset 0xF9	3696 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `13dcea99abe3788ac76d5f08bf51387691ca5b404886ed8d2560b4dfa7cbdbc9`	deobfuscated-js	split-join delimiter stripped JavaScript at offset 0xDB1	2333 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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