PDF malware analysis — malicious · 2fab1d4f7c03d295

MALICIOUS

PDF

32.2 KB Created: 2010-01-14 14:55:49 +03:00 Authoring application: goingIts (via e2a23af417a2344fe3a23e652924091f)

MD5: 25fc46bbc82ef07f5a5d76bd1f0b9aa4 SHA-1: 07c8a4e1fce79c3f1c8f588dabda3bdbc425f062 SHA-256: 2fab1d4f7c03d295cb495e49973a69f8831d9ceafdce4aafac8eed234bdf715b

158 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript, specifically 'javascript_obj0016_001.js', is likely responsible for executing the malicious payload, although its exact function is obfuscated. The presence of JavaScript actions and eval() calls points to an attempt to bypass security measures and execute arbitrary code.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

Heuristics 6

ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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.
Optional Content Group with action trigger low PDF_OPTIONAL_CONTENT

Optional Content Group (layer) co-occurs with an action trigger — content can be selectively hidden from viewers or scanners while the action still fires on open
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_obj0014_000.js` `239cdadc61626e05f32445bdf32098275a965a02153378366bb03674617210f0`	pdf-javascript-stream	PDF /JS object 14 at offset 0x1ADF	35558 bytes
`javascript_obj0016_001.js` `950a9412d37f685e68469069f7ec1eefac31aed258b9e00552c525ec860b63c8`	pdf-javascript-stream	PDF /JS object 16 at offset 0x7554	1672 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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