Malicious PDF — malware analysis report

Static analysis result for SHA-256 1398eb0f92b9adfa…

MALICIOUS

PDF

70.7 KB Created: 2021-09-08 16:52:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6b3702789d54bb2c4af8e9cda3d358d7 SHA-1: 66053ddcc9cb6605369c3761c875dcdf5eb25081 SHA-256: 1398eb0f92b9adfadc04e224b03c3df8b987a2ceb0f5201bf23e69d537c6f7f9
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are structured as a link farm, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7740

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://ontogepszerviz.hu/editor_up/fivupijebusapuz.pdf In PDF document text
    • https://highfieldhousehotel.net/nbloom/fckuploads/file/91808553393.pdfIn PDF document text
    • http://meuseguro.top/fotosempresa/files/32189437300.pdfIn PDF document text
    • http://badischer-kunstverein.de/ckfinder/userfiles/files/3246940851.pdfIn PDF document text
    • http://www.ettermanenterprises.com/ckfinder/userfiles/files/tenibewovunirosisejimi.pdfIn PDF document text
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/fuparomivukupax.pdfIn PDF document text
    • https://www.vignolaweb.it/ckfinder/userfiles/files/23047656168.pdfIn PDF document text
    • https://pataniforum.com/admin/jquery/ckfinder/userfiles/files/somob.pdfIn PDF document text
    • http://sysquare.com/UserFiles/files/bitogosobevivugofegoruf.pdfIn PDF document text
    • https://fundacionamigosdelmarcaribe.ong/ckfinder/userfiles/files/famebitavapukokewo.pdfIn PDF document text
    • http://bouwbedrijfansing.nl/userfiles/file/nibamobexawejitivibozosek.pdfIn PDF document text
    • http://minhanh.com/files/71331037283.pdfIn PDF document text
    • http://creatinglifeoptions.com/userfiles/files/fewon.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/piburunaji.pdfIn PDF document text
    • http://prestinoequitacion.com/imagenes/upload/files/pepikasufamete.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/wubin.pdfIn PDF document text
    • http://cermak-expo.cz/data/files/file/rimijedarapejof.pdfIn PDF document text
    • http://noithatsah.com/webroot/img/files/sigad.pdfIn PDF document text
    • http://china-baby-clothes.com/d/files/muwudesa.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/76992368696.pdfIn PDF document text
    • http://portaldeaquidauana.com.br/ckfinder/userfiles/files/fivuzo.pdfIn PDF document text
    • http://reklamavysocina.cz/UserFiles/File/43341853082.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613058ae0ee75---kitotuwi.pdfIn PDF document text
    • https://alshuka.ps/ckfinder/userfiles/files/77081671929.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=alfonso+lopez+quintas+libros+pdfPDF link annotation
    • 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_off0000e8a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A4 19612 bytes
SHA-256: 481bd43aac4cfed4644c7d7b51bd292425102e50caba6480ec4c2fa93a29482a

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