PDF malware analysis — malicious · 3ca67c0e75bcb208

MALICIOUS

PDF

4.0 KB

MD5: 3f81fbb99a36d240929c5170dd1bcc36 SHA-1: 3db804e7c666e0defa2351b99c57417fdb2cfdb5 SHA-256: 3ca67c0e75bcb20899fbb8c6ff2c004a471e3f7a584cd30480c7b2704758580a

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

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 decoded JavaScript stream suggest obfuscation. The presence of two extracted JavaScript files, `acroform_b64_00.js` and `javascript_obj0013_001.js`, further supports this. The obfuscated script likely downloads and executes 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` `173d76cd45c9a20e9ffc1cfdf3bc68f4b57c7af46b72133af67af7be31aaaddd`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6337 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` `c438bd19e4bca079728cf8d5e8a8f705099b3013fe1f8141a15a092c71a9048a`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3600 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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