Malicious PDF — malware analysis report

Static analysis result for SHA-256 02a30e07cff010fe…

MALICIOUS

PDF

102.1 KB Created: 2021-08-09 15:13:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b23ef2b124d97652efd237018008dfd7 SHA-1: dbc652d58253c7a1af7330d1b18be19f6f7a481f SHA-256: 02a30e07cff010fef23cc128b44e58d936297422ed49b79790b5db101bddaa3f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to external websites, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content likely prompts the user to install a fake browser extension or update. This is a common social engineering tactic to facilitate credential theft or malware installation. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9878

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://chcial.ru/uplcv?utm_term=vcf+to+plink+format PDF link annotation
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607790261e107---gunovowinejeduvaluxeni.pdfIn PDF document text
    • http://bronia.org/userfiles/file/80975599439.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/a21fa4fa5d9c939508b29263e1f5e949/zugetipuzasiwotomowib.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/kolotisifetozurud.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/07/07/file/3010514692.pdfIn PDF document text
    • http://archimax.ch/dynamic-images/cms/file/raxunejazepipunet.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/rdrmalespc3lbmvvj48sf5p1nl/76259703605.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/5cf2916cd0e2538874414f644ca48b1d/85231082090.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611079dd5f089---16125088304.pdfIn PDF document text
    • https://cungcapthitdetuoi.com/app/webroot/files/images/pages/files/58139669886.pdfIn PDF document text
    • http://qca.ch/userfiles/file/nuzesoweruvu.pdfIn PDF document text
    • http://hanart21.com/files/userfiles/file/xejodipalupipikelapofeb.pdfIn PDF document text
    • http://stl-hk.net/userfiles/51558888878.pdfIn PDF document text
    • http://kosmonautika.ee/ckfinder/userfiles/files/dowodu.pdfIn PDF document text
    • http://atya.eu/files/file/96556039509.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608584e58973f---fezatuwovexoxibudesom.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca4415f598---fofitopiposu.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609e7cbc657af---bugegaradivajurepipawij.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acdee63eeab---39646662682.pdfIn PDF document text
    • http://waypl.pl/upload/File/bifinalivodesoz.pdfIn PDF document text
    • http://johnsonsdynastyincfamilyassociation.com/clients/10108/File/zabejulixasujesit.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/80706406157.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/e720dbe98c9a7de94e731f62374ad309/xovujepadabegebatotejut.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097e4ac9971d---26938388898.pdfIn PDF document text
    • http://betheaskssd.com/flash/betheaskssd.com/file/43704733276.pdfIn PDF document text
    • https://vpntraffic.com/upload/files/vajarifif.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off00012ccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CCF 17116 bytes
SHA-256: 1f062485ad4db6f0b0ff5d304a6f30003de797cda2d652f3f46ac99bc2460b0b
font_01_sfnt_off000159f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001720e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1720E 10400 bytes
SHA-256: 4ba2c39468fdd0eb17d356a4b7bc248bfd61705f3691259cf31a7b4bf513d4bd

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