Malicious PDF — malware analysis report

Static analysis result for SHA-256 78cd96be2dfc9af5…

MALICIOUS

PDF

63.5 KB Created: 2021-09-06 10:56:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b5171cba1f5d9c9897d0a69d64a59336 SHA-1: 699b43502ab6aed86840faf146dc628afefab834 SHA-256: 78cd96be2dfc9af5031f049bd990074d8f159f3631737063c1f9059d53c4086e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF that contains numerous links to external websites, many of which are hosted on compromised CMS platforms. The ClamAV detection and ML classifier indicate malicious intent, specifically identified as phishing. The presence of multiple PDF links on disposable hosting suggests a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5526

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://studiomarcheluzzo.it/userfiles/files/vatofaluvowifi.pdf In PDF document text
    • https://media-get.com/userfiles/files/68776071363.pdfIn PDF document text
    • http://csc-021.com/userfiles/file/20210702015858_p1jsfv.pdfIn PDF document text
    • http://getwealthythisyear.com/ckfinder/userfiles/files/sukazi.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/08opssco0tegon527efahmqqr6/nobobukedurufeniwisejomep.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160974afec10f3---vuvadabexifobonip.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160cac165805c3---xalabawabilikesukopeleno.pdfIn PDF document text
    • https://connatlas.com/home/conn/public_html/ckfinder/userfiles/files/41241772056.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16074151b350e5---vafogumegegowilalolijom.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16071ddddd58a3---fuwutoj.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbecf7face---86356221993.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/73940180049.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/66724828889.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/9c1b426e0a8ea521a7ae6b22e06408c6/pimuropatasuxexagavo.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3cd4259dae---dejivebivevexegezurixefi.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5aa5396431---poguligew.pdfIn PDF document text
    • http://beiks.info/public/file/wifamewilefufapafutafagor.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/23744138039.pdfIn PDF document text
    • http://konakelektrik.com/userfiles/file/pefekifepegazafejanixap.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/m9ra7fe3optdid6jfoivfemncg/53792766174.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2bca8896a8---42878644434.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/23720866087.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5637b22ae4---mejebopuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=manual+moderno+guatemala+telefonoPDF link annotation

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