Malicious PDF — malware analysis report

Static analysis result for SHA-256 e767dead45eca7d7…

MALICIOUS

PDF

70.2 KB Created: 2021-06-17 22:50:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c46213d3342cb4aa4bf8be427d98d70a SHA-1: e5ec6f9f21efb90f436021a41d477cc12ed8393b SHA-256: e767dead45eca7d789e429835f57b859f4f8e0ebbd38d8945e9cf0a7acae0c6f
154 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML and ClamAV, indicating it's a phishing or trojan delivery mechanism. It functions as a link farm, directing users to compromised WordPress upload directories, likely to download further malicious content. The document's content is obfuscated, but the presence of numerous links to potentially compromised sites strongly suggests a malicious intent to redirect users to harmful resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7644

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0fd828fe35---najofufowupubalif.pdf In PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c2272c305cc---38477738482.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a5c56335d---44853826980.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/eu144u972ejfl2uqkqpd826dq4/sibugumiriwewegete.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607630c03f7dc---zizevuzazowutopavixukemam.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079fba1bd247---popufixeninoso.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608845498430f---darafifitekadujedetir.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/ad210c25693b01d1b7b3b33b7f208225/84209636071.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf94a9cde79---86406959873.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160b33574d2acb---wosonidabojimozogebu.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1609074aba92ab---pumererekalepebinitasol.pdfIn PDF document text
    • http://tktravel.shop/FileData/ckfinder/files/20210602_5022AC248A7DF89C.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/jodaxogojawus.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/5cbdadb4986ec56a6fe98a5bb1cbc824/foxun.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/44a553bf83c5acb5a67e17b2e461ce14/reniti.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/3b46922ffee0c55b4379cf936dd4e9e5/10100572661.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/5fvr5de13l13ie48suukhl4ver/40258020845.pdfIn PDF document text
    • http://starwindows.ie/ckfinder/userfiles/files/81092332112.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=como+aprender+espanhol+pdfPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF147 5188 bytes
SHA-256: 59e076f634084b41931a0ecca5af23daf66dff291b15de5baabd41b9bdd1ded5
font_01_sfnt_off000102b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B0 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d

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