Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c19b19c98ce0595…

MALICIOUS

PDF

63.6 KB Created: 2021-09-15 14:17:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: fd8ae8b4413bf77d998303e5b50b26e7 SHA-1: 9e59bafd1e54d7f815f08d99a034c91f2ae88190 SHA-256: 3c19b19c98ce0595d97099123939b689f25c3bff6d4a261c6b1746f6bcfc8d4d
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as a PDF containing a link farm, with multiple heuristics indicating its nature as a compromised CMS upload or disposable hosting link farm. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious intent. The embedded URLs likely serve to redirect users to phishing sites or download further malicious content.

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 http://mybed.tw/uploads/files/202109102028072248.pdf In PDF document text
    • http://pasted-radio.de/web/files/97728993760.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613ed7c01b78b---99262846088.pdfIn PDF document text
    • http://piazzademarini3ge.com/userfiles/files/nivitajeresu.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/161322d151ac65---lirudazilodibekunafo.pdfIn PDF document text
    • http://snailgame.ru/upload/files/20210902094613.pdfIn PDF document text
    • http://helloslow.com/data/userfiles/files/geneperugarimovegoze.pdfIn PDF document text
    • https://vinamex.info/uploads/news_file/purin.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/tl5cqfv9setc1ns2fvlbsvaklk/67915505877.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/3b489a25fa80db75b8380ce12f46f84f/61173663001.pdfIn PDF document text
    • http://adwokaci-pila.pl/userfiles/file/4852188433.pdfIn PDF document text
    • http://advocaatindex.nl/images/uploads/wopenitimu.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/c4e89dff3b70da8fbcbc85036285de6f/kigusit.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/2092592ac16b574dd26f567d454c0a34/27468646037.pdfIn PDF document text
    • https://vicareyou.com/userfiles/file/menugu.pdfIn PDF document text
    • https://asken.as/bilder/file/65815041582.pdfIn PDF document text
    • https://altstudio.be/app/webroot/uploads/file/29749865247.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/df33dad1de98d7f2ebe901cb33e466e2/62779311548.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/161331baa3c95e---begemalojosuniteruf.pdfIn PDF document text
    • https://hostsolutions.ro/app/webroot/files/userfiles/files/61805426590.pdfIn PDF document text
    • http://amsaneeraus.fi/userfiles/files/nobikevitu.pdfIn PDF document text
    • http://www.brickchamber.com/ckfinder/userfiles/files/sowonazanovejowa.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/16139b49031e46---5198975369.pdfIn PDF document text
    • http://www.boldino-hotel.com/ckfinder/userfiles/files/74365600636.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=powerpoint+free+apkPDF link annotation

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