Malicious PDF — malware analysis report

Static analysis result for SHA-256 944e0f1894770ed1…

MALICIOUS

PDF

45.6 KB Created: 2021-10-22 11:13:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: dfebf2e6dd7960ce521c60c2c61991d4 SHA-1: c97fcedf400feb599f4e051ed912641d1d2efa3e SHA-256: 944e0f1894770ed193af77c9d63ed2da3b5575bb83c26263fdac364d2cc71f4d
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised or disposable hosting. These heuristics, combined with the ML classifier and ClamAV detection, strongly suggest a malicious intent to redirect users to potentially harmful content. The embedded JavaScript likely facilitates the redirection or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7407

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://mfahk.com/upload/files/50860368480.pdf In PDF document text
    • http://ekbdrive.ru/ckfinder/userfiles/files/2117540811.pdfIn PDF document text
    • http://xn--rssx31a7tec6p.com/upload/userfiles/files/20210926045352.pdfIn PDF document text
    • http://hotelbasantresidency.com/uploads/vuwipelita.pdfIn PDF document text
    • http://vigova.com/Images_upload/files/sutosuporiguw.pdfIn PDF document text
    • http://konikanarrowfab.com/ckfinder/userfiles/files/pawivajuxutunovudevojilux.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1617082a46c874---kepazezapomivipetijezadav.pdfIn PDF document text
    • http://edilgroupdigiovanni.it/userfiles/files/4854743042.pdfIn PDF document text
    • https://kuzeyilac.com/resimler/files/71328301060.pdfIn PDF document text
    • https://jewfri.kr/files/image/files/98025696948.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/jeu94qndnb9nsns78c82ssn2j0/98524530859.pdfIn PDF document text
    • http://productinfo.in/konadnew/userfiles/file/mizetemaj.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/161584a70bfa5b---nifekodanujoxereti.pdfIn PDF document text
    • https://gozdekadife.com/resimler/files/93838575486.pdfIn PDF document text
    • https://bankkartya.hu/js/ckfinder/userfiles/files/mamokewuniwotifojilibe.pdfIn PDF document text
    • http://gyliver.ru/files/files/50885865594.pdfIn PDF document text
    • http://lamgi.pl/ckfinder/userfiles/files/bolarirebofupo.pdfIn PDF document text
    • http://www.dreamstoreonline.es/ckfinder/userfiles/files/17542675170.pdfIn PDF document text
    • https://cytairtool.com/test/userfiles/file/20211019_be6c6.pdfIn PDF document text
    • https://xn----7sbbg1ddpkdc.xn--j1amh/uploads/files/lapagig.pdfIn PDF document text
    • http://verduciautodemolizioni.it/userfiles/file/19945945867.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/050da94214272c7369aff97283e766be/98698029770.pdfIn PDF document text
    • http://kalkulacka-hypo.cz/userfiles/files/jewopexumupi.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/D9plVHj2VOU/uplcv?utm_term=stay+still+meaningPDF link annotation

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