PDF malware analysis — malicious · b6e3fc7efdf53ae0

MALICIOUS

PDF

11.1 KB Authoring application: Anguish such perils past returnst thou wouldst scape from pyrrans have bounce.

MD5: 624a3dd2b18d7a7ac688137705e70c31 SHA-1: 746ddf26c674af86351fe721bd731b6c273f0679 SHA-256: b6e3fc7efdf53ae0b0bb7c12f030451dc8229df544d9c3a330124e45f3e52e10

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 and PDF_JS. The JavaScript stream, identified as javascript_obj0018_000.js, is heavily obfuscated, making its exact function difficult to determine. However, the presence of unescape() and String.fromCharCode functions suggests an attempt to decode and execute malicious code, likely to download and run a second-stage payload.

Heuristics 5

unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0018_000.js` `82bd4a9bd414449cfb65b05ab4331d8c28f3d8de5e3c449b1a56e2dda1fb2a4d`	pdf-javascript-stream	PDF /JS object 18 at offset 0x4BA	163935 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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