Malicious PDF — malware analysis report

Static analysis result for SHA-256 8170489001885f90…

MALICIOUS

PDF

62.5 KB Created: 2021-09-20 06:49:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: a1c33797a37d47b21e2b60b3e1461f8c SHA-1: 1134d31317e68368978def48fb1ab10904876bc7 SHA-256: 8170489001885f90f57d0f9feef5bfcc0a4d131edaabccde80671df40ebc6cb2
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7000

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 https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b55c459124---gumiwoxujagoforiwuna.pdf In PDF document text
    • http://dissanna.com/temp/fckeditor/file/fufamodexezifeju.pdfIn PDF document text
    • http://rafaelstore.ru/upload/files/nowoniduxoloso.pdfIn PDF document text
    • https://flomogroup.com/upload/files/mojekapavagu.pdfIn PDF document text
    • https://textmakareknutsson.se/upload/image/5783707225.pdfIn PDF document text
    • http://gsxr.hu/userfiles/file/tubuxamoperolivalixe.pdfIn PDF document text
    • http://xn--aknmedcal-wpbe.com/uploads/file/74614096454.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/jupemen.pdfIn PDF document text
    • https://thietbivesinhanhhuy.com/asset/files/79538207173.pdfIn PDF document text
    • https://onlinendttraining.net/files/12777601680.pdfIn PDF document text
    • https://jhservice.net/imagenes/galeria/files/xuzajitadewekulokov.pdfIn PDF document text
    • https://nayyaralidada.net/alpha/ckfinder/userfiles/files/dozosukojewogimemim.pdfIn PDF document text
    • http://ameshamagazine.com/js/upload/files/7078540544.pdfIn PDF document text
    • http://dogoxuavanay.vn/uploads/files/wowivosipexiduze.pdfIn PDF document text
    • https://landatur.com/files/galeria/files/pavakudebapadewuluxope.pdfIn PDF document text
    • http://www.prctech-th.com/ckfinder/userfiles/files/betogotuxidufomivaz.pdfIn PDF document text
    • https://ptkas.com/kingkong/userfiles/files/kuvukojedozuvokela.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/f62c0ed6a27de092dc21972316c252f9/pibuloxa.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/62148120353.pdfIn PDF document text
    • http://bakineshr.az/ckfinder/userfiles/files/19699502462.pdfIn PDF document text
    • http://xn--72c7caerxx0d3a9eve.com/UserFiles/File/2588181055.pdfIn PDF document text
    • https://zaindu.drogomedia.com/files/galeria/files/linatedamodurubinavijo.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16140ba773b95d---90069323812.pdfIn PDF document text
    • https://worldmedglobal.com/userfiles/files/86403306075.pdfIn PDF document text
    • http://labonguyenhoang.com/img-chamthi/files/rofiweso.pdfIn PDF document text
    • http://atel-j.nl/uploads/files/jikovetuvezepafugiguxof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=my+hero+academia+heroes+rising+online+subPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE31 19072 bytes
SHA-256: b2de576218c52efe6ee122cb28fb12aec80562555a655ea42b9c1fdfef621df9

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