Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fb47a16c90f44bb…

MALICIOUS

PDF

60.9 KB Created: 2021-06-27 23:45:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f64efd399d3c1a2c7456d27dea104335 SHA-1: 961c4c5db75120e924b922e1f0b66d5b1011c3a8 SHA-256: 8fb47a16c90f44bbf5dc7abb69ed94f475c033fc20b84e521753ba1b82c181a1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to external PDF files hosted on domains flagged as compromised or disposable. This structure is indicative of a link farm, likely used for SEO poisoning or to distribute malicious content. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5046

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://adance0112.com/upfile/editor/file/lalit.pdf In PDF document text
    • http://geredekombiservisi.com/userfiles/file/kifetuf.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607860cff27b6---83424941370.pdfIn PDF document text
    • http://cheapmarkt.com/userfiles/file/97771292008.pdfIn PDF document text
    • https://nezrenpin.com/calisma2/files/uploads/84497637136.pdfIn PDF document text
    • http://splogservice.ru/content/file/12345588941.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c993e354b1b---2096690708.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/5mft0dbfmbiljg5hlr3rotlp38/rofofeb.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/wuxomusafatufaxotamisiwo.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d040dae643---juxetexo.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/65123340383.pdfIn PDF document text
    • http://sea-cruise.ru/ckfinder/userfiles/files/situmitujekuso.pdfIn PDF document text
    • http://stlnsk.ru/uploads/file/16445400952.pdfIn PDF document text
    • http://weddingceremoniesbybev.com/clients/72651/File/xivoze.pdfIn PDF document text
    • http://sam-global.info/files/file/laruka.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bbfdde7794f---52839473787.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607495614519c---54290883652.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/c0f2e3d758c7461ea37f9ded2c2867b9/sopamizidetidesez.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc0073c47c---gigixinilem.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c67160d651e---vigigoratobawafa.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b737d0b73---likupukijadowaz.pdfIn PDF document text
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607826edce33d---26521364926.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a53bbd24111---89257040579.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/59731675238.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609afe20e6acd---314117539.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=tancet+question+papers+with+answersPDF link annotation

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