PDF malware analysis — malicious · bbb8aed4b5cd9766

MALICIOUS

PDF

4.3 KB

MD5: 177bee9600205c9f94fbcac4f4269e65 SHA-1: 974a3a7e2f8c38356ac2198d9dc0513b971cf704 SHA-256: bbb8aed4b5cd976678f34f208c9c35e32e3df5645b0faea7ae9d393c7181990c

114 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File Execution: Malicious File T1566.001 Phishing: Spearphishing Attachment

The PDF file contains embedded JavaScript and a RichMedia (Flash) object, indicating an attempt to exploit vulnerabilities. The presence of `eval()` and `String.fromCharCode` in the JavaScript stream suggests obfuscation and dynamic code execution. The extracted JavaScript file, `javascript_obj0017_000.js`, is likely responsible for downloading and executing a secondary payload. The file also contains references to 'exploit.swf', further supporting an exploit-based attack vector.

Heuristics 7

RichMedia (Flash) high PDF_RICHMEDIA

PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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.
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_obj0014.bin` `09da31fcb002129249bb529a7f84709739a96f62781db5f4c6d9bf6e4308eb15`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x4D1	102 bytes
`javascript_obj0017_000.js` `28cbefe89b37cb3f6c5d4df02c5eae6975a9b886cd8d7cc3cfdb134516a5d70c`	pdf-javascript-stream	PDF /JS object 17 at offset 0x5EB	1744 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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