Malicious PDF — malware analysis report

Static analysis result for SHA-256 f26b76aed60a87dc…

MALICIOUS

PDF

69.3 KB Created: 2021-09-22 16:22:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8073db700a91d48819aa115105d64099 SHA-1: 052d1405fadb99a285e7479f59c38d21c9a21953 SHA-256: f26b76aed60a87dc8dc272ac0ad4f951d41073f3bc3842c54238b9946ac9afb8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a 'wwe 2k20 download for mobile' lure in one of the URLs indicates a phishing or scam attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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
  • 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 http://www.greddy.com/admin/common/ckfinder/userfiles/File/81595516170.pdf In PDF document text
    • http://malerbetrieb-malanders.de/Webseite/pics/fotos/1/file/7868502366.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/favatunuzida.pdfIn PDF document text
    • https://kudamatsu.org/userfiles/file/29002804688.pdfIn PDF document text
    • http://cautrucpalang.vn/webroot/img/files/nupuzojaweragibegu.pdfIn PDF document text
    • https://curewelldiabetes.com/userfiles/file/26567559528.pdfIn PDF document text
    • https://chennothinterios.com/uploads/file/69804137389.pdfIn PDF document text
    • http://finproekt-msk.ru/userfiles/file/tuwefimofipumo.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e0cd536466---78271725900.pdfIn PDF document text
    • https://www.ventisilva.com.br/ckfinder/userfiles/files/pobifufujif.pdfIn PDF document text
    • http://www.nagsa.es/ckfinder/userfiles/files/49658645862.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/onjd851q5enbnt3apasfk6ak4p/kemeni.pdfIn PDF document text
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/dazudupoloro.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/gewevitulapima.pdfIn PDF document text
    • http://svenskafik.se/uploads/fckeditor/file/xodusepu.pdfIn PDF document text
    • https://labelmarket.pl/data/file/wowigopemaj.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/161432ef02d4b4---84732873819.pdfIn PDF document text
    • http://lungshingcentre.com/userfiles/linurusulabu.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/ecda9c7b223c74602357b24a56789245/tipejutipawizazofizugev.pdfIn PDF document text
    • https://learnrkbin.jugalbandiresearch.com/ckfinder/userfiles/files/64662985008.pdfIn PDF document text
    • https://hojoairport.com/images/file/bewapevigajatolakevovida.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=wwe+2k20+download+for+mobilePDF link annotation
    • 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_off0000b06b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB06B 15304 bytes
SHA-256: 75a2cd7ff88a07b4c1a094aa06fc2be5376595016915865e4ae92dbf5f983959
font_01_sfnt_off0000d71c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD71C 10804 bytes
SHA-256: 9af7f6627d16259a9b1d90923fd797bf190f7012bef9378e9b9b1c3725ca65cd
font_02_sfnt_off0000f00a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1