PDF malware analysis — malicious · d2e70c34dff4e966

MALICIOUS

PDF

5.1 KB Created: 2008-08-06 01:42:27 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 5fbf78af146716085850e803c474f79f SHA-1: a409687fdbebec19a31f6ffce3735ca8cdc57148 SHA-256: d2e70c34dff4e966f36e9e8726b26bb8c842c5d05c85ff71e4283218b685bc1b

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell T1204.002 Malicious File: Malicious File

The PDF document contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. A high-confidence PDF_EVAL heuristic firing suggests the use of eval() for code execution, and String.fromCharCode is also present. The deobfuscated JavaScript file 'acroform_b64_00.js' likely contains the malicious payload. The script's purpose is to execute arbitrary code, potentially downloading and running a second-stage payload.

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` `08becbdd84bfa1d1d72cad2ec1d07d5f1c0b49e4a8d27e4850d465e5de3f9ab2`	pdf-javascript-stream	PDF /JS object 13 at offset 0x369	6733 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` `46b254707222386ac6bb575a82d74a2b957dd05fd1f0b50280b3e642447abefd`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x725	4370 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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