Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c0d0a110e6f80dd…

MALICIOUS

PDF

62.5 KB Created: 2021-09-05 00:17:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 87eb74cb548d21e89cf376bd005f8aa4 SHA-1: a9ec6629340ec56cd75da58b6b6d82d24ba96439 SHA-256: 8c0d0a110e6f80dde605ac03dc1212be1b7801a2772b0494c85bf4e74e09efec
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage locations hosting other PDFs. This structure suggests the document is designed as a link farm to redirect users to malicious content, likely for phishing or further malware delivery. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5048

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://c-six.it/userfiles/files/70854887340.pdf In PDF document text
    • http://ferrocom-spb.ru/userfiles/files/buzadiwurulezugewok.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/57c483691d28e07576d899ff13d55110/22898231178.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/5dcb5d6ubu0l7r31u9o3gvq9j7/66021211091.pdfIn PDF document text
    • http://turksebruiloften.nl/userfiles/file/69025470703.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2c1a0bde6---ziganuwiw.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/160725727e0adf---wubonajive.pdfIn PDF document text
    • http://compufoxmail.com/FCKeditor/editor/filemanager/connectors/userfiles/file/57400789819.pdfIn PDF document text
    • http://pulsarvn.com/media/ftp/file/witamafaduxaderuwi.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/13189320942.pdfIn PDF document text
    • http://divorce-difficile.fr/userfiles/file/sadesedesividadugudovafas.pdfIn PDF document text
    • http://ouhkpthaa.org/userfiles/59509560878.pdfIn PDF document text
    • https://branchennachweis.eu/userfiles/file/vakexaditeludekufubur.pdfIn PDF document text
    • http://sity-luxe.ru/userfiles/file/80839055589.pdfIn PDF document text
    • http://sola-brothers.com/userfiles/file/86801196876.pdfIn PDF document text
    • http://teaandtiara.ca/clients/c/cf/cffd5a667a547ddf6f7ed7e454f715b7/File/kewerejalavekimijujubux.pdfIn PDF document text
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/a785cb7cbb6b21c9f52e066b7511502b/dumegomefavolawali.pdfIn PDF document text
    • http://sanxuatbanthinghiem.org/app/webroot/uploads/files/kafalirovub.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5e122d4307---fibujuxegirupopuwebu.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/5cb79f97cf8c1eecc3c067310a8b5b53/1660888619.pdfIn PDF document text
    • http://garderoba.sk/images/_file/forunibanokoxaji.pdfIn PDF document text
    • http://women-for-marriage.com/ckfinder/userfiles/files/6410248536.pdfIn PDF document text
    • https://doluhosting.com/calisma2/files/uploads/68464565193.pdfIn PDF document text
    • https://bluza-shop.ru/content/File/56442574141.pdfIn PDF document text
    • https://giyimkent.formenemlak.com/upload/ckfinder/files/pijupuruxup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=food+diary+pdf+freePDF link annotation

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