PDF malware analysis — malicious · aaa56c999135f1a8

MALICIOUS

PDF

37.7 KB

MD5: ff8c19b30e07b4ca6dbdb19fde120001 SHA-1: 424b9836e72f1b651a71f58d091ea87c661d6f09 SHA-256: aaa56c999135f1a89381c067a232782de9db8759905382ea80c310679400c542

94 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.001 Spearphishing Attachment

The PDF file exhibits multiple indicators of malicious intent, including embedded JavaScript and rich media (Flash) content. The presence of a JavaScript stream, identified as 'javascript_obj0006_000.js', suggests an attempt to execute code. The PDF_FROMCHARCODE heuristic further indicates obfuscation techniques commonly used to hide malicious scripts. While the exact payload is not immediately clear from the static analysis, these elements strongly suggest the document is designed to exploit vulnerabilities or download further malicious content.

Heuristics 7

RichMedia (Flash) high PDF_RICHMEDIA

PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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.
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
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
`embedded_file_obj0016.bin` `ce5f7936cf8e3536a88a804ce2d6902022df1794fa878bdc64a26866e34ba989`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0xACB	55839 bytes
`javascript_obj0006_000.js` `70338146233515d0283f4b77a4f33ff8f3480ec11efdda17c838836c7eada04b`	pdf-javascript-stream	PDF /JS object 6 at offset 0xF5	1588 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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