Malicious PDF — malware analysis report

Static analysis result for SHA-256 f06612b1ec363657…

MALICIOUS

PDF

84.3 KB Created: 2021-09-05 01:17:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: cbfc3eabacbba284d0d070809b45fa29 SHA-1: 597c414ca1b896afde8bf9e9700ea733ab1de9fa SHA-256: f06612b1ec363657698c904df23d816d41c252c799b099542fa488af39b0700a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. Several heuristics indicate the PDF is part of a link farm, with many external URLs pointing to potentially compromised websites or disposable hosting. ClamAV detection and ML classification strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • 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.
  • 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://yodishit.com/uploads/userfiles/file/pivedasawekumudi.pdf In PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/rrsblldke2fou35vt6gjb35d8f/domepesoj.pdfIn PDF document text
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160856cd2ca817---57211738921.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b84ec3a9e7---piwenu.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/86578230667.pdfIn PDF document text
    • http://vincentpopetutoring.com/clients/d/dd/dd6b7bcf94cac99d3bed97cf8166637b/File/10083016204.pdfIn PDF document text
    • https://mimpiindah1.com/contents/files/mojipekubovelugorazor.pdfIn PDF document text
    • http://www.s-prom.si/fileupload/file/8832025287.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c58aba797---duzag.pdfIn PDF document text
    • http://3colorjazz.com/fckeditor/userfiles/image/65385682635.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/b4368bbc82f466ebdc2eebc8606c2e83/57570191123.pdfIn PDF document text
    • https://hattoco.vn/images/ckeditor/files/90113238759.pdfIn PDF document text
    • http://binhchuachay.info/Images_upload/files/84126315674.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16086cbe8bd4b7---20768784096.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/jakeje.pdfIn PDF document text
    • http://universalestetic.com/userfiles/file/5570609739.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f54a8bdf89---valalasila.pdfIn PDF document text
    • https://cafeau1ait.xyz/js/ckfinder/userfiles/files/lijaxofojelomenavodoj.pdfIn PDF document text
    • http://cabini.it/userfiles/files/80257130494.pdfIn PDF document text
    • http://plncse.hu/php_data/file/rivekixawafawer.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/gsf63askdd1n8i2ne0tjtr4im6/xegazuvapegamigun.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161085009f1b8d---5879549249.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d5c48c21cb3---kibotakozenavofimeba.pdfIn PDF document text
    • http://chromoink.com/updates/file/21365111165.pdfIn PDF document text
    • http://comlark.ru/userfiles/files/xozozuvad.pdfIn PDF document text
    • https://tradingcall.in/ckfinder/userfiles/files/mupupezeviguti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=jang+safeen+in+urdu+pdfPDF 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_off0000d952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD952 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF164 21740 bytes
SHA-256: 12f2e0ebcea0ba3822b618bafe2d692038d93ff8cdb96e527f25df4aa05fb7d0
font_02_sfnt_off00012b4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B4B 10500 bytes
SHA-256: 316f7acc6f6ae7262e089a0aceb8cdd70673108bcd392796bc69b7caf58eb096