Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b631206d36cfa04…

MALICIOUS

PDF

92.9 KB Created: 2021-07-10 06:11:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 771573d92f13aa2d94a729e3572b5f27 SHA-1: b45cad2f500b687bd74cc87727af962232399e10 SHA-256: 6b631206d36cfa049a91ec5381e22a79a247fe912ebb409dfe7a74ddb4b7a1a4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external websites hosted on compromised CMS upload storage. The presence of numerous links and the use of disposable hosting suggest an attempt to obscure the true destination or to distribute phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5769

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 https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/66d8be63ebd85805e72fe81ee543c630/63299962247.pdf In PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/do1i8u91d7vdkubp8pkdp43mru/43360673846.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/8973adf6c061c58d1ba819fbe5cba3ab/52045349234.pdfIn PDF document text
    • http://aiskreunion.com/clients/b/b4/b417c2091670ce0b0d78f4b231aea02c/File/petuluwinefobozefejimuti.pdfIn PDF document text
    • http://www.jokilaaksonratsastajat.fi/file/52304621553.pdfIn PDF document text
    • http://chono.mn/uploads/userfiles/files/libovitolukekub.pdfIn PDF document text
    • http://www.majbrno.cz/uploads/files/menisoxapipoxixizigemebi.pdfIn PDF document text
    • https://mobilieroccasion.fr/uploads/file/sizokusa.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/93b3bc919681953452d5d78f4b1b252d/43885624182.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077fa52a7c91---goneriniwojamoranoteva.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/ceb6c4c8da19622fa8712243622e454b/30262035971.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/a454c00f538ba1108607b057f6454607/13717255736.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/a01ee78eb8794a096ba45e439be78b4e/8525677553.pdfIn PDF document text
    • https://estoniapools.com/contents//files/33717618149.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/qu3v991r6ri7b1sblejdghpbqc/49548151494.pdfIn PDF document text
    • http://gerd-pollak.de/userfiles/file/13442747241.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa9e729354---87132736879.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/983a3748f9dfbb6c39642383c71f49a4/xefugexerasagofukotore.pdfIn PDF document text
    • http://fujiya-la.com/uploads/files/tevukuravetixutuj.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/15417798262.pdfIn PDF document text
    • http://statewideroofservices.com/clients/b/b8/b825a24af54c157c196cf52173d75bf0/File/81198791878.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/kg66nvd40i98l02ba45jmifqdm/20481118838.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/rotipalirurodetudewubivo.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/8ea41d6d00293c4aed150ada286f9877/vadudi.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/lubaxixubukumodonezagikus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=scaling+and+renormalization+in+statistical+physicsPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f79b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79B 16172 bytes
SHA-256: 8214b55e030c3cb37d727e4c02e4f9fe3cb7b8fc3885df20e34cb8ea79a6e3ab
font_01_sfnt_off00010d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D31 23124 bytes
SHA-256: b6a73fe21637bdbbe23154f89f745394c644c65650b237a360ae09854beb1faa
font_02_sfnt_off000146ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146AE 11212 bytes
SHA-256: b5677f6ffbd28dbfd6d83a573f06cf5ae85d64d101754519d9a73474bec32216