Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff5134411da66e32…

MALICIOUS

PDF

63.7 KB Created: 2021-09-06 06:54:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 233a392ccbb6bbe5710b46455358998f SHA-1: dbe084e53cbc75b3ab6cf9faf4b5f8fd0fc46d22 SHA-256: ff5134411da66e32e661162521ab61f944cf95f25a518b4bf803ecb6dc9c3936
124 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and contains numerous external URIs pointing to compromised CMS upload storage and disposable hosting. These links likely serve as a lure to redirect users to malicious sites, potentially for phishing or malware delivery. No scripts were extracted, and the document body was unreadable.

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://oniceh.ru/uplcv?utm_term=hereditary+disorders+pdf
    • http://goreskyreunion.com/clients/b/ba/ba087d28c24afe6c5bc45fa062332e47/File/xexalebixusujunukamu.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093316f6e72b---80690151979.pdf
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/ae4d61a8a076e41f6c59a7441532d7cc/39279002163.pdf
    • https://alianzatours.com/imagenes/file/35498419431.pdf
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/1sbjr7p2ros1oh9h0nbun812r4/dekaz.pdf
    • http://tfforming.ru/d/files/40445147845.pdf
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/731f88308a15ac691d625edc03a6a4bf/77047897751.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3cf9007e9b---69139902112.pdf
    • http://centrumbiznesurawicz.pl/userfiles/file/lerijur.pdf
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/6c13a9cdad160d0cadf1332e91c6fdbb/90153483667.pdf
    • http://kaztelcom.kz/ckfinder/userfiles/files/moguguv.pdf
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9ca2dfb5a---78021207302.pdf
    • http://www.chp.pl/ckfinder/userfiles/files/turuki.pdf
    • https://techielingo.com/fck_uploads/files/45639212720.pdf
    • https://boucherienabli.com/uploads/FCK_files/file/bajorijijago.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b60dc93bb3e---5930447163.pdf
    • http://bangkoksolarpower.com/syner_upload/images/files/41518318185.pdf
    • http://vivaibonomo.it/userfiles/files/jenitikugokiwinade.pdf
    • https://cordovajewelry.com/images/file/mutanuxenitujuso.pdf
    • http://simsvizag.com/admin/uploadedfiles/file///46714235000.pdf
    • http://nhakhoauytinhaiphong.com/upload/files/32641990615.pdf
    • http://daisytalavera.com/userfiles/files/jitilopawuladiw.pdf
    • https://samtee.com/admin/images/file/69865998321.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611e615b66412---luwiriwuzabijutugitozapin.pdf

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