PDF malware analysis — malicious · c293f655f0f41c2a

MALICIOUS

PDF

4.0 KB

MD5: 62c0f9a2975e0bdb1fee980becc9ecce SHA-1: d480677517bce36ee568dc484346d7920f6ed71a SHA-256: c293f655f0f41c2a04dedced1bde4b95645ffd9811116dda18427bb483078d3b

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1027 Obfuscated Files or Information

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 stream suggest obfuscated code execution. Two JavaScript files were extracted: `javascript_obj0013_001.js` and `acroform_b64_00.js`. The presence of obfuscation indicators and a long encoded blob points towards the script's intent to download and execute a secondary payload. The exact nature of the payload could not be determined due to the obfuscation.

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` `ed03de4aac00db82982641b7c290c03524d728f7051a9ec0bec1ef26ff389f5a`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6309 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` `a5165d8970ea84fa1dedb42be41baa0ebab50337a9fa52487189a692a1df7b55`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3579 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).

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