PDF malware analysis — malicious · 1eabb57e797c0be6

MALICIOUS

PDF

27.3 KB Created: 2010-03-16 08:18:34 Authoring application: aHa8P (via ofw4khHSH)

MD5: 30a97d6b7e4e7933b9c3b8af12c95603 SHA-1: 9b89ffd25b82f1ec450403afc71d5b6e02c68244 SHA-256: 1eabb57e797c0be640d4982819afbc7b3e463174a22b79fd4432acbc9e646f58

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream utilizes `eval()` and `String.fromCharCode` for obfuscation, a common technique for hiding malicious code. The primary heuristic firing is PDF_EVAL, suggesting the script is designed to execute arbitrary code. The extracted artifact `javascript_obj0007_000.js` is also suspicious. The script's intent is likely to download and execute a second-stage payload, though the exact mechanism is obscured by 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.
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_obj0007_000.js` `f01610da8930c84c1626af4e4a19a7511f99fe370786c944801da735ca4a2a14`	pdf-javascript-stream	PDF /JS object 7 at offset 0x23A	26758 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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