PDF malware analysis — malicious · 886b8ec4e298d4f2

MALICIOUS

PDF

2.8 KB

MD5: a9335c01974e683459c796cc91506151 SHA-1: 7215711bd926cd6f05b3700f69797a73337ec5ed SHA-256: 886b8ec4e298d4f22cd09dca1901690e36336a83ccf128034618819482adf92e

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT', 'PDF_JS', and 'PDF_EVAL'. The 'PDF_EVAL' and 'PDF_FROMCHARCODE' heuristics suggest the JavaScript is obfuscated and likely executes arbitrary code. No document body text was available for analysis, but the presence of these JavaScript indicators strongly suggests the PDF is a malicious dropper. The embedded JavaScript is likely responsible for downloading and executing 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_obj111611_000.js` `b7ff52b415e1b03e3f96ea84dadd5cd6f30a32eace0411b58a689d565f7fd326`	pdf-javascript-stream	PDF /JS object 111611 at offset 0x197	258 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj111612_001.js` `f1fe5346f85bfd5c4decebc81b3426a77592e9bd7ede33db85b61d9c59db4b1b`	pdf-javascript-stream	PDF /JS object 111612 at offset 0x268	3267 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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