Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcd31278aea0a96a…

MALICIOUS

PDF

66.3 KB Created: 2021-09-06 18:52:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c41bf6aacf224a1f098ce4791c1b5af5 SHA-1: 7b7f19eb71ea6f17ab084783b91b8666b43823bf SHA-256: bcd31278aea0a96aecef7d6ba0c1a4d78480e799bdc62ab527685debfb7577db
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a Pdf.Phishing.Trojan signature. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and embedded URLs indicates an attempt to direct users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4986

Heuristics 5

  • 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 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://inwebjor.ru/uplcv?utm_term=chronological+study+bible+pdf PDF link annotation
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d22416d7b3e---77663270416.pdfIn PDF document text
    • http://delta-serwis.pl/pliki/21313783804.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1610a826b644a3---47912823451.pdfIn PDF document text
    • https://aksukartela.com/images_upload/files/13748132095.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/32555292658.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a687a259804---60030222325.pdfIn PDF document text
    • https://paperland.bg/uploads/file/mukikarozakazan.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070011bf2a08---rebogonipiseme.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4f5531e1a---tuniviz.pdfIn PDF document text
    • http://hoangminhphatkorea.com/webroot/img/files/sisifibinoxekexugepudulu.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/jcgie3g50rvr0ggceh3n9imguq/fagidibozuxanodeboniw.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/1246725176.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/99233391926.pdfIn PDF document text
    • https://istocdukkan.com/userfiles/files/wozurobonajudexepapuga.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0012c1f97---lifudupevolikokonelufaxi.pdfIn PDF document text
    • https://guanlai.tw/uploads//files/202108111648061828.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16293743480104.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/56ddae2a9d652ab6bb007663329ab513/topobapevewawilegalixa.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/85095512970.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/61167b25e732a879f2e21f2cfae7b3bb/mosemape.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/c4aad54d36916534629f348ee8628485/nizurevabo.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfdf44075c9---jakirazotakawebibazatil.pdfIn PDF document text
    • https://ecohort.com/userfiles/files/39404175940.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c911afb3671---loxujatini.pdfIn PDF document text

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