Malicious PDF — malware analysis report

Static analysis result for SHA-256 5421084f2a6aaf17…

MALICIOUS

PDF

71.7 KB Created: 2021-09-23 01:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8f7b9bb1faadb91f0070b6017f0d0d26 SHA-1: eade1b1c25d8addacda6b32d36253b2f7da2823c SHA-256: 5421084f2a6aaf17c19e77d1f02a71cdcc50dcc93afdbd26006493dfc2d0c0d7
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1071.001 Web Protocols

This PDF document functions as a link farm, directing users to download files from compromised WordPress sites and disposable domains. The ML classifier identified it as malicious, and the presence of numerous links, including those pointing to potentially malicious PDF files, strongly suggests an attempt to distribute malware or facilitate phishing. The document's structure and the nature of the URLs indicate a coordinated effort to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6611

Heuristics 4

  • 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://kfgame.snailgame.ru/upload/files/20210921092804.pdf In PDF document text
    • https://g4m3s-4p1-12s1.com/contents/files/fefozasodilarelubexam.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16139ed63a776d---29133240193.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/2021911128197946.pdfIn PDF document text
    • https://salondumariagededijon.com/userfiles/file/47868978317.pdfIn PDF document text
    • http://peaceinsrilanka.lk/ckfinder/userfiles/files/xigimivit.pdfIn PDF document text
    • https://e-ceramika.pl/userfiles/file/31134230180.pdfIn PDF document text
    • https://ice-group.pl/userfiles/file/jagisil.pdfIn PDF document text
    • http://www.niziointerior.pl/upload/file/wupagutidap.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16139258f3924d---8199243807.pdfIn PDF document text
    • https://adikketiga.com/contents/files/39604889708.pdfIn PDF document text
    • http://ajisushionline.com/uploads/files/jutawipoderune.pdfIn PDF document text
    • http://trendstyleimage.com/uploads/ckfinder/userfiles/files/27681483177.pdfIn PDF document text
    • http://xn--80adic7alej3d.xn--p1ai/userfiles/file/12721031276.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/161479eb8359e9---40445855037.pdfIn PDF document text
    • https://aashianarealty.com/file/61592110263.pdfIn PDF document text
    • http://traslochimontalto.it/userfiles/files/vafidatatimaxigizov.pdfIn PDF document text
    • http://culfordequestriancentre.org/UserFiles/file/mikuvekogagezupelabaduj.pdfIn PDF document text
    • http://plaschke-partner.com/uploaded/file/78452992847.pdfIn PDF document text
    • https://gulfsupremesa.com/ckfinder/userfiles/files/58133714105.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613a6b6b84123---zupukila.pdfIn PDF document text
    • http://archi-m.ru/userfiles/file/48280195550.pdfIn PDF document text
    • http://etre-belle.su/images/file/wixununu.pdfIn PDF document text
    • http://psychologkmalinowska.pl/ckfinder/userfiles/files/ranimojukemekexofiwibimoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=descargar+pokemon+oro+heart+gold+para+androidPDF 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_off0000e04e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04E 18372 bytes
SHA-256: 365a0289ad230b64c881fd7779f64d3be6f3d2db73f7262c854bd3e84e4c912f

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