Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a4cfd25cc77afb7…

MALICIOUS

PDF

56.7 KB Created: 2021-07-24 22:22:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ad2f61223715a06fa0ebef1d34880e00 SHA-1: c141d3d8da60cdffe4c507b3b56f8c32482a27dd SHA-256: 7a4cfd25cc77afb74127ed5c163fa3af862caaae3dc574318778096751a4889c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a phishing or malware distribution campaign. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_URI heuristics further supports this, indicating the document is designed to drive traffic to potentially malicious or compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7557

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 https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/0ac67e04ca92ecf011616536bf898bfa/40857424728.pdf In PDF document text
    • http://bogelaipigeon.com/upload/file/68025162701.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/uumrq96st8s5die4euc2tkvf97/16310110858.pdfIn PDF document text
    • http://matras-devison.com/upload/file/nufemabasiraw.pdfIn PDF document text
    • http://csc0516.com/userfiles/file/20210713205337_zl5rve.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/lk8nv7ph99mpfomvvfd46ofsgt/pizup.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/a50c0d178a018edce66bd39fe66ef807/dosifizula.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/rudajozagugudadovesa.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/7g4aa9n726a377e9pb70p1upv1/53311005091.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/5494790403658eea1cb1dc1e87f8f208/57815101733.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb02b777b8---4370978705.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/49775780978.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/78317aa354550c12c76e16a26ff90a81/xatuvoximerugijupuki.pdfIn PDF document text
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/65bt99a7ht9e1onqk7s0o5p5ku/xepobiv.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/p70h70teo0fvvoi8biqf1umhf4/81716523649.pdfIn PDF document text
    • http://rotarylaspalmas.org/documentos/file/16369764474.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/rifixisetalurotupasebos.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/83d8b650e62521bb0b25850279373473/pibiripisononobedokozi.pdfIn PDF document text
    • https://wecareprogram.org/images/file/39951469948.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/73590229913.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160747ac0aa4c8---zovepijeralesunize.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609916960b6ad---xeximutafike.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/tunetalotigesodut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=glencoe+algebra+1+mid+chapter+5+test+answer+keyPDF link annotation

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