PDF malware analysis — malicious · 60f16ea6b9883d06

MALICIOUS

PDF

3.2 KB

MD5: b223d722a871c70c6ff4b055d76de7e6 SHA-1: 2a5efe187aa362b6494f89ea4f72a92a928ba181 SHA-256: 60f16ea6b9883d060085cd4cc592ad8d00d3dbb43caa36c06bb6194b5621e3bc

196 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript that utilizes unescape() and a loop to construct a URL, likely for downloading a second-stage payload. The presence of 'exploit.swf' and 'javascript_obj0017_000.js' as embedded artifacts further indicates malicious intent. The script's primary function appears to be downloading and executing a payload from a remote source, which is a common technique for initial compromise.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 7

PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
RichMedia (Flash) high PDF_RICHMEDIA

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

unescape() found — often used to decode shellcode in PDF JS exploits
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
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
`exploit.swf` `09da31fcb002129249bb529a7f84709739a96f62781db5f4c6d9bf6e4308eb15`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x4D1	102 bytes
`javascript_obj0017_000.js` `689ec0834e5d88779131970920bdb6b107a8847453a8a2864aa9033652b623a9`	pdf-javascript-stream	PDF /JS object 17 at offset 0x5EB	1311 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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