PDF malware analysis — malicious · ddb0ff609454e946

MALICIOUS

PDF

4.1 KB

MD5: 273ee702d2ec5c1b1a35dd58c0446f56 SHA-1: cc897f5f61c62a89807821a484b591534df6d29e SHA-256: ddb0ff609454e946245e0638cce5df856ef178e690b81f50de3f980fabf0b041

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT', 'PDF_JS', and 'PDF_EVAL'. The 'PDF_EVAL' and 'PDF_FROMCHARCODE' firings suggest the JavaScript is obfuscated and uses dynamic code execution. The presence of deobfuscated JavaScript files ('acroform_b64_00.js' and 'javascript_obj0013_001.js') further supports this. The likely intent is to leverage these JavaScript capabilities to download and execute a malicious payload, a common technique for PDF-based malware delivery.

Heuristics 5

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `23088abc4f41f4be3ae757e76a1d19ffd0d07f7258fa89615df61525969586b1`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6381 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`acroform_b64_00.js` `9d8dff2109e678dbd496ef7e45a1c77e7c82eb1e6ee1b8c3c430b45fbd40ad0f`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3633 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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