Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fe015412657eea3…

MALICIOUS

PDF

80.0 KB Created: 2021-09-16 08:15:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: f711e2f2fd2f7b4756cd1373978d563c SHA-1: 8fd6209a243026fa0ff31eb34571f5b1759585b1 SHA-256: 1fe015412657eea37e5d7acc2205b869a245bb4dece5352fd0cb8ee9a7a31cd7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for executing malicious code. It also features a link farm pointing to compromised WordPress sites, suggesting an attempt to host malicious content or redirect users. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature, likely involving phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pistant.ru/uplcv?utm_term=thop+tv+online+for+pc PDF link annotation
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135ec0ff22c5---50543719719.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/9a485ef0f6bca3881ab2a32c30a7718e/81100083905.pdfIn PDF document text
    • http://www.dogwoodagility.nl/ckfinder/userfiles/files/fonasesudivigujasepozulaj.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/lejizudobefife.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/28351502058.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/55592409452.pdfIn PDF document text
    • https://siriusdynamics.com/assets/uploads/files/22165713404.pdfIn PDF document text
    • https://bocion.com/ckfinder/userfiles/files/fenomamure.pdfIn PDF document text
    • http://cross-winds.in/upload/contents/images/images/71057031369.pdfIn PDF document text
    • http://forumcutuca.com/ckfinder/userfiles/files/82285765668.pdfIn PDF document text
    • http://textingrights.com/userfiles/files/7336624729.pdfIn PDF document text
    • https://fminterativa.net/cms/plugins/ckfinder/userfiles/files/70445893129.pdfIn PDF document text
    • http://studiolorenzino.eu/userfiles/files/rilagolirenuzeragivus.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613fa4de151b7---58314417356.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4d0299c8d---10551520485.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/32639624256.pdfIn PDF document text
    • http://gat-asset.com/CKEdit/upload/files/51923348561.pdfIn PDF document text
    • https://quatden.vn/webroot/img/files/87308559566.pdfIn PDF document text
    • http://omnoiptv.com/outscapes/admin/ckeditor/uploads/ck/files/zodubefaduma.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/vamarojivo.pdfIn PDF document text
    • http://klick-tipp.at/ckfinder/userfiles/publics/files/39985480332.pdfIn PDF document text
    • https://lazeo.nl/userfiles/file/2293952385.pdfIn PDF document text
    • http://www.ernakulamarchdiocese.org/www/js/ckfinder/userfiles/files/62105157672.pdfIn PDF document text
    • http://dj-venci.com/uploads/pages/files/tidonupinoredofalazo.pdfIn PDF document text
    • http://numismatika-nbkpdy.cz/userfiles/file/wobekusipewiwatigipijad.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_off0000d524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD524 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED36 17684 bytes
SHA-256: 4f1d6c5f995742bb30c7e5a6a3ada88c3f27b16b4ffabb0ccd2d37354e324609
font_02_sfnt_off00011b0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B0C 10276 bytes
SHA-256: ccaa1bd699c03caccbcc5e28bbe61bfc9ec5e4839f12dd24ea8cecd0dcab610f

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