Malicious PDF — malware analysis report

Static analysis result for SHA-256 4241ff3b77b18fb8…

MALICIOUS

PDF

46.8 KB Created: 2021-09-01 17:56:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 715570d1f6b1249bb4ba528a47385ec7 SHA-1: 882d0455c3d75fbf01cf6916885ffaf0f7596e0b SHA-256: 4241ff3b77b18fb895abb34fe6fce82849f2f2e0a920dbe0e62656ad6d50d558
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is often used to redirect users to malicious sites or download further payloads. Several heuristics indicate the PDF is part of a link farm hosted on compromised or disposable domains, suggesting a phishing or malware distribution campaign. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7355

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://imahima.xyz/js/ckfinder/userfiles/files/70756515845.pdf In PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076d0debd3dd---dulitofudifotujaradit.pdfIn PDF document text
    • http://haiqi-machine.com/d/files/lisaxiguzupogur.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/4o388d2lvaucumoplqo0v05ql7/49443383705.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/565ni6m5thgj9js58jbirnefit/95042089115.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16086c424e8be2---39535100284.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/rukuk.pdfIn PDF document text
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a78d68f986---tilevefexozadezafimodono.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/39836691044.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/161013929257ce---xawokokitemaxado.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/xikolifagibuxibikudasor.pdfIn PDF document text
    • https://arerp.kr/data/file///9894352388.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a675b34f156---vojilesi.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/00d0e35369529891d0d73ddf64d8205a/xixilofinuzar.pdfIn PDF document text
    • https://flyfinz.com/userfiles/files/22657709470.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/fd38cu120n0rllj6ganq2854g6/motosatovabesufafirupumu.pdfIn PDF document text
    • http://rulife.ru/ckfinder/userfiles/files/62775666423.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/nafotatanujojoxivolipot.pdfIn PDF document text
    • http://potya.com/vupegolopavawoki.pdfIn PDF document text
    • http://bethelhanberryaaa.com/clients/2/24/2465ef4bb9bb1b7382310ae17d7cafeb/File/pifutemujanikuxumivuxe.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/30016522482.pdfIn PDF document text
    • http://myblindz.com/fck_user_files/file/59399396333.pdfIn PDF document text
    • https://livredart.com/ckfinder/userfiles/files/velefof.pdfIn PDF document text
    • https://adeptos.clevercloud.pt/images/items/files/4937475448.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16092318ccec6b---xikanoxugub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=physics+principles+with+applications+pdf+downloadPDF link annotation

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