Malicious PDF — malware analysis report

Static analysis result for SHA-256 32980c0d79962e68…

MALICIOUS

PDF

79.4 KB Created: 2021-09-17 11:35:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e2263017ed96d416ca546af05155d86a SHA-1: 93f0d05aecee38847ba9c457b94944439881177a SHA-256: 32980c0d79962e68eec9aa9821159ba185ec178bbd87f1d1ae12c4c173d835d0
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for delivering malicious content. The PDF also contains numerous URLs, many of which point to other PDFs, suggesting a link farm designed to host further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://regalmotors-jp.com/js/upload/files/nibosamapilufapudukevofav.pdf In PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/sikomivobo.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/kiwabewava.pdfIn PDF document text
    • https://chaletsuenodesol.de/files/gunidaxuvatefume.pdfIn PDF document text
    • http://sumosushingrill.com/uploads/files/wenatupexotafuluferuzurot.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/60662711911.pdfIn PDF document text
    • http://scuderia512.com/js/upload/files/sagolusi.pdfIn PDF document text
    • http://xn--9i1b14lwsg1seumdzsx.com/upload/fckeditor/file/farakakifeluzen.pdfIn PDF document text
    • http://liluby.com/upload/file/58738905985.pdfIn PDF document text
    • http://aybar-gallery.com/userfiles/files/dopidawefiwelinafi.pdfIn PDF document text
    • http://nusratali.com/userfiles/files/74172094984.pdfIn PDF document text
    • https://bahceneryaman.net/public/content-images/files/narexojiwejomosu.pdfIn PDF document text
    • https://takarasushimn.com/userfiles/files/bejuzemudazim.pdfIn PDF document text
    • http://nattukoottam.com/userfiles/file/66521025443.pdfIn PDF document text
    • http://perechen-jurnalov.ru/js/ckfinder/userfiles/files/45529709243.pdfIn PDF document text
    • http://zhihepvb.com/upload/ckimg/files/202109011152066897.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143c3952153d---wobopubanoxaj.pdfIn PDF document text
    • http://wccflooring.com/userfiles/files/bevikotepis.pdfIn PDF document text
    • https://casalindasbakery.com/ckfinder/userfiles/files/mexozuko.pdfIn PDF document text
    • http://cuboni.com/uploadfile/hong202109161851292210.pdfIn PDF document text
    • http://balashixa.inhome360.ru/admin/ckfinder/userfiles/files/seropomo.pdfIn PDF document text
    • http://canigrup.com/userfiles/file/mafaliviperuwilekafibuz.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16136d6022e354---78469721977.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=sound+waves+physics+pdfPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d19e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD19E 10916 bytes
SHA-256: 974b19b65f1ce3361fec4be9db3874724819adc481a4873e486f81d608e20296
font_01_sfnt_off0000eaea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000102fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102FC 17436 bytes
SHA-256: 5a469e44048eacd3343995e2531cfa1f675fa635ae467d55eba8820553b8b8c6

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