PDF malware analysis — malicious · aaad8666d97f909a

MALICIOUS

PDF

4.0 KB

MD5: 40aed900fbbd9b3a4d666888a02e22ee SHA-1: 32590a674bb200295b25295f19c2e244d68cc718 SHA-256: aaad8666d97f909a2bf88b837dcdc6be0807285aba0a745c9c08fef967053e9b

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The `eval()` call and `String.fromCharCode` usage within the JavaScript streams suggest code obfuscation and execution. The extracted JavaScript files, `acroform_b64_00.js` and `javascript_obj0013_001.js`, are suspicious artifacts. The primary function of the embedded script appears to be the download and execution of a second-stage payload, a common technique for 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` `cf66fc98e480ee0f6629847d5e24a3e52b6fa9a87b89963ba8e6c9c3c211ac56`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6385 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` `a3591957b5be880c911faea942f84e173c4a3fc3fab3d87ac4031da808aab95d`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3636 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 4 long base64-like blob(s).

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