Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaeb81ba54acd5b7…

MALICIOUS

PDF

62.3 KB Created: 2021-07-16 01:47:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a4b5ed698b726ed77ce9542ee0040733 SHA-1: e2824fc08f9f0ea66c4e14f123ab0718c807f760 SHA-256: aaeb81ba54acd5b7dc0b34056376e015dee95fed73a160330a768eb7336ced51
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. This script likely redirects the user to external URLs, as indicated by the numerous PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a phishing or malware delivery intent.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4857

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://bangdientunhk.com/upload/files/33531281189.pdf In PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/259867849dca281c768aea03851a188c/26338426394.pdfIn PDF document text
    • http://j1medical.com/uploaded/file/wurabuwodozivusuka.pdfIn PDF document text
    • http://changwontour.kr/FileData/ckfinder/files/20210704_E15EDEC82974F845.pdfIn PDF document text
    • http://tahi.hu/ckfinder/userfiles/files/41727797397.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/24741683838.pdfIn PDF document text
    • http://allycatering.com/userfiles/fukinunubamavixubewezavi.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3898c0eed3---57895122485.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/18764337889.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a6776925566---15587099404.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c58f0571818---29220413938.pdfIn PDF document text
    • http://fruhmann-elektrotechnik.at/xobanozuwodalovowaxuv.pdfIn PDF document text
    • https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/4671kiup3t4lcql9du1741sbpt/9320975347.pdfIn PDF document text
    • http://lightofislamonair.org/uploads/files/vipizezegi.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/ad05536a6c3b0d774fa5758785381f3f/nijomexedonorawazidebobak.pdfIn PDF document text
    • https://mgs-on-track.com/uploads/misc/files/74237082863.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/f46t6llmgruve8okiou4cqrekh/tetawuxajemobop.pdfIn PDF document text
    • http://paintmaster.hu/js/ckfinder/userfiles/files/kovobapefo.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9d6773036---pibidevezokojizo.pdfIn PDF document text
    • http://kanchanaspa.com/ckfinder/userfiles/files/woxidagoriwixedomovagobu.pdfIn PDF document text
    • http://henca.com/files/details/file/jepisujuwalirosowamega.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b36d2d8f0f6---lupurunoxe.pdfIn PDF document text
    • http://elm3rad.com/file/36272123921.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=judgement+the+good+works+of+ser+ruthPDF link annotation

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