PDF malware analysis — malicious · 6142d00872003eb6

MALICIOUS

PDF

8.0 KB

MD5: adda6bc0eda1f0a935400f66132e7858 SHA-1: 374781bc9d8c6eb4e4cb920d312227cd7999fda4 SHA-256: 6142d00872003eb67737fe3316597b2cb25caebeafbbc82c299d316f14bb45bc

98 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF document contains embedded JavaScript, indicated by the PDF_EVAL and PDF_EMBEDDED_SCRIPT_PAYLOAD heuristics. The ML classifier strongly flags this PDF as malicious. The embedded JavaScript is likely intended to download and execute a second-stage payload, a common technique for initial compromise via spearphishing attachments.

Machine Learning

Nyx PDF Classifier malicious score 0.9989

Heuristics 6

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
Embedded script payload in PDF stream low PDF_EMBEDDED_SCRIPT_PAYLOAD

PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://ns.adobe.com/xdp/
- http://www.xfa.org/schema/xci/1.0/
- http://www.xfa.org/schema/xfa-template/2.5/

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0008.bin` `04462f810d6eacdacecc9d0a5f3f81bebc722af4415e04da19b520338f642b51`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xD7	67 bytes
`embedded_file_obj0009.bin` `984a346671265f638e28c6f18a78a6dac023cc310f32d8ad0ab6a680d4c92579`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x162	781 bytes
`embedded_file_obj0010.bin` `9e22ae248b84e1687a0129c0f1bf301d348d22522b1688ac09e97ea9d49f2f42`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x4BA	144 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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