Malicious PDF — malware analysis report

Static analysis result for SHA-256 209bd7929dd857d0…

MALICIOUS

PDF

87.2 KB Created: 2021-07-19 16:04:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 80361f55b9815858c8a07b7ccc34b338 SHA-1: 87ce18d4a652eafa3417a7fff854cbdbeb44f94f SHA-256: 209bd7929dd857d06f5e9b249054b1ef9b7db66d73941c85c2379815a96f54eb
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised CMS upload storage and disposable hosting, indicating a link farm designed to redirect users. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification strongly suggests malicious intent. The primary goal appears to be directing users to potentially malicious content through a series of redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://www.johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/59147918815.pdf In PDF document text
    • http://gianniarnaudo.com/userfiles/files/40039580833.pdfIn PDF document text
    • http://www.cerel.eu/images/wyswig_images/file/sekaxegivixegi.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160af98c17307b---jirokekixofekufax.pdfIn PDF document text
    • http://weberstellen.ch/userfiles/file/robane.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/jatuzogitumubavozid.pdfIn PDF document text
    • http://randoquad72.fr/userfiles/file/riludulawakamolixixex.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9ed2a80a9---11557255100.pdfIn PDF document text
    • https://studiovizia.com/webroot/img/content/files/gajejuneporusobazuzu.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9478cd6ba---97704830479.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/a10705072453966c76f7dfb20a458743/908508768.pdfIn PDF document text
    • http://inwallendorf.de/userfiles/file/luropaxokikomexejokedel.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/gg8tpkjco0c95c3uuimnpj25tr/45753907708.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c91ee7245bf---26792889055.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e63a1235d---19571041630.pdfIn PDF document text
    • http://ned.ru/uploads/files/2765215737.pdfIn PDF document text
    • http://szentdorottyapatika.hu/files/4752119395.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722e4f5d807---35926087879.pdfIn PDF document text
    • https://astdubai.co/userfiles/files/32057810137.pdfIn PDF document text
    • https://hotelindigha.com/FCKeditor/file/revididemevi.pdfIn PDF document text
    • http://olimpic.hu/ckfinder/userfiles/files/34996662431.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/e713fptc8i40anq3kqbrh64vuc/16723818548.pdfIn PDF document text
    • http://csc-021.com/userfiles/file/20210702024211_o8wl79.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160adaa672ee9f---1469195776.pdfIn PDF document text
    • http://www.lebedosapartotel.com/data/yukle/files/83809813482.pdfIn PDF document text
    • http://mav-auto.ru/images/file/sevotoxan.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ca41bfd14---fowowaxokevetubutepon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=rhymes+with+bePDF 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_off0000f3de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DE 10228 bytes
SHA-256: da20de63d4a1d7f53ecbfb2f15d141f4accc78752ffe934cb275fa56151cc396
font_01_sfnt_off00010ae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE9 17192 bytes
SHA-256: 82c5648dd931cebc566848cfe4acb3eb30ac84793a855f33cba5beb1db646c96
font_02_sfnt_off000137cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1