PDF malware analysis — malicious · e76f3e059627cb3a

MALICIOUS

PDF

9.2 KB

MD5: 34d742d96366c7e237888067a34a5ca1 SHA-1: 02cf1e795aff83f169c6acd0e4330982d16357f5 SHA-256: e76f3e059627cb3a85d14e388aee78b0e8bb5c96e095d8b151005d3cede687c2

60 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains an embedded JavaScript payload, indicated by the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic and the presence of 'acroform_b64_00.js' and 'stream_002_off00001c29.js' artifacts. The ML classifier strongly flags this PDF as malicious. The embedded script is likely responsible for downloading and executing a secondary payload, as suggested by the nature of such embedded scripts in malicious PDFs. The XFA form heuristic also points to a non-standard PDF structure often used for exploitation.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 3

Embedded script payload in PDF stream medium 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.
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_000_off000000f1.bin` `2dcd66bc877eb5497a432be31aace25bd425a31bfd9f5a56daf2efb6b510fb46`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xF1	11216 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`stream_002_off00001c29.js` `802d438667647c22effba3673c8068f34e58b653ada783afc1e0d65d256071f9`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1C29	5533 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 long base64-like blob(s).
`acroform_b64_00.js` `febd711333bcc33a4ae9965f269645aaaca7963235541481f66c9e765240b72f`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0xF1	8412 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 3 long base64-like blob(s).

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