Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5740b8012c6b604…

MALICIOUS

PDF

88.5 KB Created: 2021-08-12 15:14:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7d6e0ad2ce0f75a00e5de8162291a5a8 SHA-1: effc1c53ed620c4dffd4a92e103c6099f5c42596 SHA-256: d5740b8012c6b604acea14c47b9491fc0e1c0cdd56a0a46c237385b72b53458f
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • 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
  • 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://mudrberanova.cz/userfiles/file/93549521470.pdf
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/6bc9f23be8b4865b7c3f9527f8fc3e22/mubevanebijifatasiwina.pdf
    • http://tiramisu-o.com/yamituki-n/uploads/files/5345287595.pdf
    • http://www.europesolidaire.eu/userfiles/files/81419322714.pdf
    • http://dichvu12h.net/userfiles/file/dofopaxogalefuziz.pdf
    • http://czechdidgeridoo.com/admin/upload/file/xegojebomamazudig.pdf
    • https://winpoasia.com/ckfinder/userfiles/files/sexusejojipigisukixuweral.pdf
    • https://lesartsdansmonjardin.com/userfiles/file/20210524111003.pdf
    • https://franchise-vietnam.com/app/webroot/img/files/zedovevumadarugub.pdf
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/4d2bdeda3002fae2829275c5848c78d7/81086083197.pdf
    • https://sproname.com/files/userfiles/files/33119868424.pdf
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c3a056f82e75ed4064bc681baf48eead/sogexiga.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/247a979c8bbc6ffa485925706af9f433/87967580132.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c4f509e2d---35959061978.pdf
    • http://pusancard.com/userData/board/file/19922885330.pdf
    • http://reicar.dk/userfiles/file/96102937621.pdf
    • http://www.vnv.nu/admin/library/ckfinder/userfiles/files/zalomimokuwemarakakujefo.pdf
    • http://myshopekerala.com/userfiles/file/34180681138.pdf
    • https://e-midas.ro/files/file/kuwaferemufewuronigisi.pdf
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f7fa88872b8---22001255911.pdf
    • http://leaguengn.com/userfiles/file///jizapujitiguzulakukavado.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1606d57eaebfb9---55244831734.pdf
    • http://juha.be/_files/file/jefavitezixisozi.pdf
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/33942r2sc9mrkjb9vf5gkko4a5/nopunejuguzitemu.pdf
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/677b45c5e9b438703bd1a4ff9fb6b266/zasutag.pdf
    • http://gourmethousemacau.com/UploadFilesfile///firemidikijexilarodupewis.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=%D1%8D%D1%80%D0%B8%D0%BA+%D0%B1%D0%B5%D1%80%D0%BD+%D0%B8%D0%B3%D1%80%D1%8B+%D0%B2+%D0%BA%D0%BE%D1%82%D0%BE%D1%80%D1%8B%D0%B5+%D0%B8%D0%B3%D1%80%D0%B0%D1%8E%D1%82+%D0%BB%D1%8E%D0%B4%D0%B8+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE+%D0%BF%D0%BE%D0%BB%D0%BD%D0%BE%D1%81%D1%82%D1%8C%D1%8E
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4bd.bin
45399cd08a89aa860cbe9260637fd5e8833957c4308783a4fd63d650bbacd80c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BD 11264 bytes
font_01_sfnt_off0000fea9.bin
bb8de38f5db7c3fc33705398e17b8246386c69ca07a8cec9ca73b57a4b88ea9f
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA9 22892 bytes
font_02_sfnt_off0001379e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1379E 16792 bytes