Malicious PDF — malware analysis report

Static analysis result for SHA-256 a931f207ce6b69fe…

MALICIOUS

PDF

49.7 KB Created: 2021-09-28 14:43:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 92f4cf3a4d84642d9d5e3b53c896ebd2 SHA-1: aab0c4ca1c77548e149187c23f5b1c960d6db9e9 SHA-256: a931f207ce6b69feda72e524f44cf3d437e4b21b7cc94706a2b553f37f2976c4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7444

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 http://mikailang.net/userfiles/file/20210906003826_732657658.pdf In PDF document text
    • http://osteriadelcampanile.com/userfiles/files/niferelenoj.pdfIn PDF document text
    • http://scarpatti.com/files/10932322861.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/fivibodurivagijewug.pdfIn PDF document text
    • https://anctools.com/ckfinder/userfiles/files/datore.pdfIn PDF document text
    • https://demircanticaret.com/userfiles/file/86158734907.pdfIn PDF document text
    • http://smirna.pl/files/file/mikulaxirajelubemita.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/161366952216e8---dopadikegananaroj.pdfIn PDF document text
    • http://xn--80aafbjcazdrhzgiddbbcsg4l.xn--p1ai/pict/file/2759583393.pdfIn PDF document text
    • http://ordinate-ltd.com/file_media/file_image/file/13831732131.pdfIn PDF document text
    • http://ryanoomen.nl/uploadimages/files/pesijakulaj.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161440714d15e7---63472265193.pdfIn PDF document text
    • http://poltinka.ru/userfiles/file/zemekebidilabenazifekifa.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/cjccdpic23f542ko2g9pul39kb/69458474837.pdfIn PDF document text
    • https://mbamantra.com/ci/userfiles/files/88046481938.pdfIn PDF document text
    • https://rosycaffe.com/file/16754239088.pdfIn PDF document text
    • http://offerparts.com/upload/files/neruparavapotewagedi.pdfIn PDF document text
    • http://cnhhgj.com/upfiles/userfiles/file/jafoko.pdfIn PDF document text
    • https://dbhattacharjee.com/ckfinder/userfiles/files/xuwinezodubanoxedanokezo.pdfIn PDF document text
    • http://nesemlak.com/test/images/uploads/files/subewimusiwulapirez.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1613cc91ec52f0---wezawozovebizitevepidow.pdfIn PDF document text
    • http://zbirozskepodzamci.cz/userfiles/83003120944.pdfIn PDF document text
    • http://insei.eu/userfiles/files/79094860243.pdfIn PDF document text
    • https://dansobentre.net/uploads/file/vodavumagegukijawab.pdfIn PDF document text
    • http://phucuongplus.com/upload/files/mitokububarigolojupaja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=how+to+like+a+text+message+on+android+phonePDF link annotation

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