PDF malware analysis — malicious · 338205436e4b530b

MALICIOUS

PDF

111.2 KB

MD5: ff9cbfda42c8862fc7d6108909e6c672 SHA-1: afef62e6cbf1ce84774dc384434deefe4647822b SHA-256: 338205436e4b530b08bfc20c77651a0756fe93b3a22a3c6439cd80890035aeee

94 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

The PDF contains embedded JavaScript and RichMedia (Flash), indicated by multiple heuristic firings. The embedded JavaScript stream, 'javascript_obj0006_000.js', is highly suspicious and likely responsible for executing the malicious payload. The presence of an embedded file and references to SWF files further suggest a multi-stage attack. The primary intent appears to be the execution of arbitrary code via the embedded scripts and potentially exploiting vulnerabilities within the PDF reader or Flash player.

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 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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