PDF malware analysis — malicious · 59e102f17ebac4a7

MALICIOUS

PDF

4.0 KB

MD5: 1226950186834cb50affede087a83774 SHA-1: 9282f1759eb98c273d5633b25269f11445bb2f7b SHA-256: 59e102f17ebac4a7875f6b0a85b70cf568b9a42e110de9f4b4434b1126f8368d

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript, identified by PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream exhibits obfuscation, including the use of eval() and String.fromCharCode(), as indicated by PDF_EVAL and PDF_FROMCHARCODE firings. The deobfuscated JavaScript, found in acroform_b64_00.js, likely attempts to download and execute a second-stage payload. The presence of these obfuscated scripts and the suspicious extracted artifacts strongly suggest a malicious intent, likely 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` `eb388a05ee7e9471e2c0e64abdf6021c2c20495436bdd957f24495862ea3efd4`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6313 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` `846c1832565a2ad4cffea41ef0d2492add66f6502ff450037b8930c98c15cfe6`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3580 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).

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