PDF malware analysis — malicious · a1e8894b8749d899

MALICIOUS

PDF

11.7 KB

MD5: 309887ead261fde981ff8a83d7dc4bbb SHA-1: 75c496d4a8f0b2c0cdc6273279272d649df262ad SHA-256: a1e8894b8749d8999b8dfeb911466e7b41e44825da065f5ce4dcf208f125c223

128 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF was flagged by multiple heuristics, including embedded script payloads and a high ML score, indicating malicious intent. ClamAV detection as 'Pdf.Exploit.Dropped-78' further confirms its malicious nature. The presence of an embedded file and XFA form suggests an exploit delivery mechanism. The embedded URLs are likely part of the exploit chain or decoy content.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
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.
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
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/xfa-template/2.5/
- http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0008.bin` `713fb41ca615a528d5c4f21e7bcc8f31b58c2bc5a1ff9a0945f9880fdb3127e5`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xC8	11182 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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