Malicious PDF — malware analysis report

Static analysis result for SHA-256 228dace34e90c7b1…

MALICIOUS

PDF

62.3 KB Created: 2021-09-13 17:22:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: bcd5bb6c4c088c817ccda3b8da4efc62 SHA-1: 8c74ce12ef0c9c9f2f89a3c7ee601972da4d75c4 SHA-256: 228dace34e90c7b1f0c82d05a3e94ced9bfd49c62d6b4435706632a26345d591
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, indicating a phishing or redirection scheme. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to lure users to malicious sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5680

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 https://inwebjor.ru/uplcv?utm_term=best+android+video+editor+2021 PDF link annotation
    • https://majubesar.info/contents/files/jupuvigamubuwurapi.pdfIn PDF document text
    • http://cioccolatogallucci.it/userfiles/file/zutumilu.pdfIn PDF document text
    • http://ptichile.cl/userfiles/file/69485884864.pdfIn PDF document text
    • http://s2ipower.com/survey/userfiles/files/xupowupufujuxunarebu.pdfIn PDF document text
    • http://bmfjhjk.friend-match.com/upload/files/73583506363.pdfIn PDF document text
    • http://littlepearlspublishing.in/data/eimages/file/46563896779.pdfIn PDF document text
    • http://matchonusa.com/uploads/files/ruxosuzumujug.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021090817262373499.pdfIn PDF document text
    • http://edisonprivateschoolbeta.com/cote_dor_import/admin/ckfinder/userfiles/files/katoratitonexijakuj.pdfIn PDF document text
    • https://gulfb2b.com/userfiles/file/wivokosolaverululupu.pdfIn PDF document text
    • https://efficimm.fr/userfiles/files/jirezigek.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/magulowuwalovovakedafudob.pdfIn PDF document text
    • http://tidomusica.com/uploads/files/202109012106529087.pdfIn PDF document text
    • https://retake.dk/ckfinder/userfiles/files/58695118776.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/161337e86ef70d---nufazesuwemomamosesexegov.pdfIn PDF document text
    • https://cheeselicious.net/UserFiles/file/98136585480.pdfIn PDF document text
    • http://bsinteriordesigner.com/userfiles/files/rakaboxewazafaredunav.pdfIn PDF document text
    • https://vanphongphampmc.com/upload/files/vemikidejikuvelilekapa.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/ad3du9qttho3u6er5e36i3vql5/75262257806.pdfIn PDF document text
    • http://somkuthyoptika.hu/editor_up/21224015020.pdfIn PDF document text
    • http://ukicda.com/admin/fckeditor_upfiles/file/2021090915174080554.pdfIn PDF document text
    • https://austdoorcaocap.com/upload/files/75358427686.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/90139825327.pdfIn PDF document text
    • http://vansuloi.com/uploads/userfiles/file/faviwetixosifowedifabo.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/5998765634.pdfIn PDF document text
    • http://xn--j1aai7d.xn--p1ai/userfiles/file/madoke.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD51 10608 bytes
SHA-256: 9673bfaec35d9dcfa0cb2a4289a074b4ca7eaecc13bf8ba46d94815baf490a6d

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