PDF malware analysis — malicious · 65e57b9040c112a0

MALICIOUS

PDF

41.8 KB Created: 2020-06-08 23:43:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a74f1bae1f45bbe50be252c4a749b047 SHA-1: fbca6f8254940b1ed3ebdef544b323466158e8c7 SHA-256: 65e57b9040c112a08e4ef443999d836ad718462ce931ef2a4a8b76379276b2fe

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded external links, identified as a PDF link farm. The ML classifier strongly flagged this PDF as malicious. The primary purpose appears to be directing users to a network of external PDF documents hosted across various domains, likely for SEO manipulation or to distribute further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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://oliviasquyres.com/uploads/1/3/0/7/130740556/130740556.html#%25C3%25B6%25C4%259Fretim+ilke+ve+y%25C3%25B6ntemleri+%25C3%25A7%25C4%25B1km%25C4%25B1%25C5%259F+so
- http://garymcarthur.co.uk/uploads/1/3/0/7/130776423/kafepowegojilupudid.pdf
- http://mydenson.com/uploads/1/3/1/3/131380942/2046176.pdf
- http://bradpulcini.com/uploads/1/3/0/5/130540021/92583.pdf
- http://saultlittleleague.com/uploads/1/3/1/0/131070559/puneziw.pdf
- http://renuevo.com.co/uploads/1/3/1/8/131856358/1427827.pdf
- http://coachboog.com/uploads/1/3/1/4/131438044/791724.pdf
- http://beautifulheartartistry.com/uploads/1/3/0/6/130603769/5440532.pdf
- http://timelesstom.com/uploads/1/3/0/5/130589122/2635021.pdf
- http://bndrzen.com/uploads/1/3/0/5/130551696/948035.pdf
- http://ravellence.com/uploads/1/3/1/4/131453182/jitulu.pdf
- http://prairieporch.shop/uploads/1/3/0/8/130814675/zarafusexadetib_litewodij_juguno_nojomatu.pdf
- http://green-soleil.com/uploads/1/3/1/3/131383838/c456daf90.pdf
- http://4fk.undesirable.us/uploads/1/3/0/6/130604996/1a9db2c.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://zogavuluv.files.wordpress.com/2020/06/raxobabokasenigub.pdf
- https://rupugidov30404460.files.wordpress.com/2020/06/58593248950.pdf
- https://wekujepomope.files.wordpress.com/2020/06/purezabigusa.pdf
- https://daritawaba.files.wordpress.com/2020/06/79400635645.pdf
- https://sudumol.files.wordpress.com/2020/06/40001426668.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006f2a.bin` `38a385afd7d46242ea63a82b2b06e3252fcc9bc90933260b553cf7b03d28d654`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6F2A	14896 bytes

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