PDF malware analysis — malicious · 20130182810f4e3c

MALICIOUS

PDF

111.2 KB

MD5: deb4dcbbe55a1bf9b60e9adc9688dba0 SHA-1: ec240996019e38e5446bc14620d55fbaf2523685 SHA-256: 20130182810f4e3c145beb2201a6628de92ab83e16c7d57d0d471213eb06f8c0

124 Risk Score

Malware Insights

MITRE ATT&CK

T1559.002 Component Object Model Hijacking: Component Object Model Hijacking

The PDF file exhibits multiple indicators of malicious intent, including embedded JavaScript and a Flash object. The ML classifier strongly flags this PDF as malicious. The presence of 'javascript_obj0006_000.js' and '20102884.swf' as embedded artifacts suggests these components are part of the attack chain, likely to execute further malicious code or exploit vulnerabilities.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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
`20102884.swf` `ce5f7936cf8e3536a88a804ce2d6902022df1794fa878bdc64a26866e34ba989`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x72C	55839 bytes
`javascript_obj0006_000.js` `4986f235d86faa58060ad3d7304bb178b7cc84690f9a9a4f66d34b086faa2bb0`	pdf-javascript-stream	PDF /JS object 6 at offset 0xF6	1434 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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