Malicious PDF — malware analysis report

Static analysis result for SHA-256 66aade82e08b5fb5…

MALICIOUS

PDF

44.8 KB Created: 2021-06-30 15:38:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-24
MD5: fe3368f4755210a51ba7d2fd84981fd5 SHA-1: a6361e65456e00af261ba1a15a2e5a6c435958cd SHA-256: 66aade82e08b5fb588f74063d1d1699bcc83e1b6b2427ea83197baf36a1aa8a9
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5654

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 2 text block(s), carries a click-outward action, and is only 44 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://dvarenda.ru/upload/file/52151783953.pdf In PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adaca633fec---labidiwumovoxil.pdfIn PDF document text
    • http://sashtraayurveda.com/ckfinder/userfiles/files/tudukozakibod.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077c6baa7de2---10658256165.pdfIn PDF document text
    • https://aslplastic.com/ckfinder/userfiles/files/dinoxopap.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/3bc1a338b54bec65d9c6f59ceeaeaac2/nonamegovuxubuxopegino.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/615260a3b654fbaa56533004f24cbb98/rijawabigelododewog.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/955774052cb61e52087784066ef02fb7/sisakimofuzupoxir.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/10c04d5e8c5eb4ca2f3fca98c682258b/27790731461.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/20210611/210611221211924785p6fen4gnchh6.pdfIn PDF document text
    • http://maility.pl_adresuserfiles/file/bijesufokirikomov.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/rolozisibibamipoje.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/9c32015e23c399da3bbb3ecd0df10db2/21572489320.pdfIn PDF document text
    • https://akvaguru.hu/user/file/6812249162.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/em1r8qbfg7jo3gjqckstcd6117/vimixowevajiwiwupemi.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160862c7acff69---rikefewixonelu.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/37087159297.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/ac75e7273bc1814b66700a3101d30c44/11909208917.pdfIn PDF document text
    • http://southfieldhigh1973.com/clients/2/27/27a5067865c8334ad4a5a1fd7642c928/File/wexojinofonafotexufosidu.pdfIn PDF document text
    • https://kermoulin.com/userfiles/file/52477701263.pdfIn PDF document text
    • https://consurs.ro/ckfinder/userfiles/files/50054705839.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608181ac9429d---81123375551.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089bfd3aff12---bizixapumugiviniruwuxasi.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/2dadc653badef5be03ce98763e5185f3/10228308551.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/8ntr1uv2m7l6uc0neacj5k7lu1/54382110551.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/78736896688.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=difference+between+homogeneous+and+heterogeneous+mixture+with+examplePDF link annotation