PDF malware analysis — malicious · 7d746e0e9cd97538

MALICIOUS

PDF

26.3 KB Created: 2011-72-51 03:25:00 Authoring application: String.fromCharCode

MD5: fee0dcac9985f9fc8f32cc29305728b7 SHA-1: 74c9c477432344673b05fdea84e3260d29fec57b SHA-256: 7d746e0e9cd97538b5de0bfc3ab63d78ec098945d3d576534f6fffdc9a2df2c5

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains obfuscated JavaScript, indicated by the use of String.fromCharCode and eval() calls. This script is designed to download and execute a secondary payload, as suggested by the 'Suspicious extracted artifact' heuristic. The presence of eval() and JavaScript actions points to an attempt to bypass static analysis and deliver a malicious payload. The exact nature of the payload cannot be determined from the available information.

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.
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0001_000.js` `7e93f157c513d143652aaeae989ff6679ec0fc260b735ac70c55941929754f86`	pdf-javascript-stream	PDF /JS object 1 at offset 0xA	922 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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