Malicious PDF — malware analysis report

Static analysis result for SHA-256 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) First seen: 2020-08-25
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 PDF link annotation
    • http://garymcarthur.co.uk/uploads/1/3/0/7/130776423/kafepowegojilupudid.pdfIn PDF document text
    • http://mydenson.com/uploads/1/3/1/3/131380942/2046176.pdfIn PDF document text
    • http://bradpulcini.com/uploads/1/3/0/5/130540021/92583.pdfIn PDF document text
    • http://saultlittleleague.com/uploads/1/3/1/0/131070559/puneziw.pdfIn PDF document text
    • http://renuevo.com.co/uploads/1/3/1/8/131856358/1427827.pdfIn PDF document text
    • http://coachboog.com/uploads/1/3/1/4/131438044/791724.pdfIn PDF document text
    • http://beautifulheartartistry.com/uploads/1/3/0/6/130603769/5440532.pdfIn PDF document text
    • http://timelesstom.com/uploads/1/3/0/5/130589122/2635021.pdfIn PDF document text
    • http://bndrzen.com/uploads/1/3/0/5/130551696/948035.pdfIn PDF document text
    • http://ravellence.com/uploads/1/3/1/4/131453182/jitulu.pdfIn PDF document text
    • http://prairieporch.shop/uploads/1/3/0/8/130814675/zarafusexadetib_litewodij_juguno_nojomatu.pdfIn PDF document text
    • http://green-soleil.com/uploads/1/3/1/3/131383838/c456daf90.pdfIn PDF document text
    • http://4fk.undesirable.us/uploads/1/3/0/6/130604996/1a9db2c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://zogavuluv.files.wordpress.com/2020/06/raxobabokasenigub.pdfIn PDF document text
    • https://rupugidov30404460.files.wordpress.com/2020/06/58593248950.pdfIn PDF document text
    • https://wekujepomope.files.wordpress.com/2020/06/purezabigusa.pdfIn PDF document text
    • https://daritawaba.files.wordpress.com/2020/06/79400635645.pdfIn PDF document text
    • https://sudumol.files.wordpress.com/2020/06/40001426668.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2A 14896 bytes
SHA-256: 38a385afd7d46242ea63a82b2b06e3252fcc9bc90933260b553cf7b03d28d654

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