Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c9adb316bd74994…

MALICIOUS

PDF

54.6 KB Created: 2021-05-16 04:18:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31986e7433853fc59dd1ffc5d53ddbe1 SHA-1: 955309d9e831074e01e656814f20f9284835e18c SHA-256: 3c9adb316bd74994a077b3b61fed6c380f1708a98322e0ce446d2679672cadc9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded URLs point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

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://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/64d32a6b52ef5491f9e453b2f2bd0dbf/gukobopimadaxetodiborugup.pdf
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/284318ca9071682b9ee2abff428f9b14/52826166159.pdf
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/88c3b0fab1e07e63debb2f4564b35970/42594417547.pdf
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/17dafcb32e7fea6e27b3641be0ac72a0/79848770868.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/k257bbie2dpc3nmfcoq151dft3/lurinanamabasunejisodi.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/7fed7a1164067f43479e75dcf50d75b5/86066599139.pdf
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/a340fb8771b4f0c1b566850236b9fd3d/vozogem.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/16093ccde7f861---kefubazejuwexaxugivivemu.pdf
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/66926d8f62459da24f6ec0d81ea567aa/sasoxiferokosatetoratazok.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/sobov.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099dddb7e75d---vutuzujipirebovola.pdf
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16077c6090ac6e---xodemorekudubadode.pdf
    • http://provia-events.de/pics/fotos/1/file/45820535824.pdf
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160890fab12ce9---boramurogegogabidosuxi.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb3257de47---39655578638.pdf
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/1kt473tv1iv9a21a7iri6krv34/91662426054.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=battle+trip+episode+90+subtitle+indonesia

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