Malicious PDF — malware analysis report

Static analysis result for SHA-256 a933eadda623b74c…

MALICIOUS

PDF

89.8 KB Created: 2021-08-09 21:41:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 093f6b829541a857ed4018da13bdcb50 SHA-1: f2e4cca166b6d53feb746e8f25d7f9c56c1e2631 SHA-256: a933eadda623b74c0ec97de1ee694d896990e4b81e7bbe1f1a7965081ae36525
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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 https://infrive.ru/uplcv?utm_term=the+kissing+booth+2+full+movie+download+hdpopcorns PDF link annotation
    • http://bigsvatcharasith.com/userfiles/file/lodafaw.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/nupuputux.pdfIn PDF document text
    • http://ingenermarket.ru/userfiles/gebofazowikitor.pdfIn PDF document text
    • http://weifong.tw/fckimages/file/61371818604.pdfIn PDF document text
    • https://www.smartfutureexpo.com/ckfinder/userfiles/files/saxegibuj.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16100cd0e337a2---gixigefawasalara.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce514a969e---pezasabalofigewamumoz.pdfIn PDF document text
    • http://yearbookplus.com/uploads/ckfinder/files/bebalalaradufoxakote.pdfIn PDF document text
    • http://poetische-malerei.de/web/editor/files/27230857347.pdfIn PDF document text
    • https://badoza.net/userfiles/file/42048904332.pdfIn PDF document text
    • https://goez3.com/10005001208290177/ckfinder/userfiles/files/84049700968.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/gu6jb0qm31ksg0ps8vc0p9p7al/74770707783.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/2945362005.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/9bbu2pii8o2mjps2891kjdest3/43689884145.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/98201030967.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/o4k1jeldpis9p7eed1o7pp6h22/bobeloweberasujadu.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c24d441f7fe---nufazupupokolofukutowubum.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/dnvs1rb8up3rnp3hjh957ht63m/15781183388.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/82353692243.pdfIn PDF document text
    • https://schlosshotel-murten.ch/userfiles/files/pipelifozinunij.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0c8411280---69434069424.pdfIn PDF document text
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/93266877882.pdfIn PDF document text
    • http://janandpoos.com/clients/872640/File/tawerinunutotadema.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/mifevusufaxotukuzofemut.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160a68bb838335---20620593335.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f0884728f---42796301270.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_off0000fa20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA20 16724 bytes
SHA-256: 6210c99ede41da190d288abbb708c6d69f3265f60926186a704492bdee718c00
font_01_sfnt_off000125d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125D4 11632 bytes
SHA-256: d456a54487a5a18a753473884418684fb2c864fd6fc58cc2d5c9e22ff30b82ff
font_02_sfnt_off00014107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14107 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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