Malicious PDF — malware analysis report

Static analysis result for SHA-256 51a2488c1baefd7f…

MALICIOUS

PDF

62.5 KB Created: 2021-08-22 02:36:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3a224d3b3aeff303bd262a0ac631b21c SHA-1: 3369ae98a280fb5df5c0269f2918515ae5ec5465 SHA-256: 51a2488c1baefd7f969d21e815f63d31c400d2f32e735e8db5177c07b34947ea
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting it's designed to redirect users to malicious content or further stages of an attack. ClamAV identified it as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of multiple external URIs and link farm heuristics indicates a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9355

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://incomsistema.ru/ckfinder/userfiles/files/61302619791.pdf In PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a76a7948a0f---liwipezojij.pdfIn PDF document text
    • http://architettomontanino.eu/userfiles/files/pevemekukukoverenezat.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/razazimukexun.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607acf7189c42---78454308653.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f836cb735b---kejesukel.pdfIn PDF document text
    • http://gamebonda.com/ckupload/files/14488157238.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608c46fce3d66---87472172888.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160838cd2d21fe---71141256682.pdfIn PDF document text
    • http://zartmobilia.com/userfiles/file/20210810190225.pdfIn PDF document text
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/94jkdp2m6o3dl8nat7he1ca2r9/67128003176.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/7b61df8274ad02fe29acf31bc9dde893/89455108466.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/e82d4be8eeb7145210b6c04548a928f0/xibapewazogobolosisiz.pdfIn PDF document text
    • http://randalljroutson.com/clients/44711/File/jememule.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c6cbb797f8a---nanowuf.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091dca32caf4---85872313030.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160c58e7cd8948---zereviwoxero.pdfIn PDF document text
    • https://loctra.net/userfiles/file/97527017174.pdfIn PDF document text
    • https://brod-plovdiv.com/images/tumafenu.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf6a20115b7---xipumaku.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609440d33b915---12851957473.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/92ed019519596f8b4c571a194fac546a/43407820175.pdfIn PDF document text
    • https://birudongker.com/contents//files/galejipebexotojoxulo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=classifying+even+and+odd+functions+worksheet+answersPDF link annotation

Open this report in the interactive analyzer, or submit your own file for analysis.