Malicious PDF — malware analysis report

Static analysis result for SHA-256 800033e19a492aad…

MALICIOUS

PDF

55.0 KB Created: 2021-09-23 00:55:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c8bbd0e79244da19ef29bbc1162bca60 SHA-1: 75a92acce5b1257f667779926a44867bf5bc7c69 SHA-256: 800033e19a492aad46d62f564ef9d338f9dd03276a448a19307649b3c38b5ba3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as a phishing trojan by ClamAV. It contains numerous links pointing to compromised WordPress sites, suggesting an attempt to distribute malicious content. The presence of external URIs and a link farm on disposable hosting indicates a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5388

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/3453e4e3358fa56659487adb67dae30a/kajofivutasire.pdf In PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/d8b89476cf64127ede9c5db622ec0ec4/siretobenavijezilesisofub.pdfIn PDF document text
    • http://chunmianxian.com/upfolder/e/files/20210920062306.pdfIn PDF document text
    • http://laxycoffee.com/upload/files/31308422219.pdfIn PDF document text
    • https://naveenent.com/administrator/imagetemp/file/gepevuxegebowabode.pdfIn PDF document text
    • http://www.samuitns.com/image/upload/File/70881447449.pdfIn PDF document text
    • https://ochronaskory.pl/pliki_user/File/biwuliwadapatesifuxugowop.pdfIn PDF document text
    • http://studiolaviano.it/userfiles/files/10490346318.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/38hq3k8dso745cepv55h53vb51/fetovabozibumof.pdfIn PDF document text
    • http://seoulmenu.com/uploads/files/faraminob.pdfIn PDF document text
    • http://maekalocal.com/Maeka/UserFiles/File/4131446004.pdfIn PDF document text
    • http://mfcpavpos.ru/file/fozowizoragulerimimenike.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613a2dedb6da6---bujejesawunoxamodu.pdfIn PDF document text
    • http://e-sportis.com/images/upload/11494925244.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/9a371caad4fd9cca45faec0afc0dcc4e/saner.pdfIn PDF document text
    • http://www.colormotion.cz/UserFiles/file/zufagumovefomanomi.pdfIn PDF document text
    • https://pachetedeturism.ro/images/files/pumubikef.pdfIn PDF document text
    • http://agro-norwa.pl/userfiles/file/silukitidakodinemetabavos.pdfIn PDF document text
    • http://hoangminhphatkorea.com/webroot/img/files/34860550132.pdfIn PDF document text
    • http://prvugkh.ru/uploads/files/sawurovadojeliwudomebo.pdfIn PDF document text
    • https://apluskleaning.com/admin/images/file/82402483477.pdfIn PDF document text
    • https://zaindu.drogomedia.com/files/galeria/files/linatedamodurubinavijo.pdfIn PDF document text
    • http://ohdiabo.net/images/ckeditor/files/lofisapotukukuvarufotaj.pdfIn PDF document text
    • http://master-vin.ru/files/file/muwinipukapamedolubukesov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=madden+nfl+21+mobile+footballPDF link annotation

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