Malicious PDF — malware analysis report

Static analysis result for SHA-256 2feda83cd51aafdb…

MALICIOUS

PDF

84.8 KB Created: 2021-08-31 00:32:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 04294a925bff7622629a95c03dc9cd10 SHA-1: d290da9db544b8b814bb7a7a7fa1cd7c80b020df SHA-256: 2feda83cd51aafdb27af6f8a95fb7517a0f5e38e7dfa2ccaf97638b849dc7f9f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm directing users to multiple compromised websites, which in turn host other PDF files. This pattern is indicative of a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://himalayanthailand.com/image/upload/File/jexokupifipaxofazikeduvig.pdf In PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/msl440ardp46t7nvvrjm7hsqkf/nenabajodegup.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b31b0239b---24364459731.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/sgu9hdep2i62aqns250d2fpeou/rodeveruritebol.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fd9f00bfb22---85032157288.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acf213b99a1---81333931243.pdfIn PDF document text
    • http://blgjad.com/upload/files/dowesatasogapumizer.pdfIn PDF document text
    • http://americasbestmanassas.com/uploads/files/zebilodozozukiropexav.pdfIn PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021082618240873499.pdfIn PDF document text
    • https://edenestates.com/ckfinder/userfiles/files/79753008047.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad251ab0a8---37042998037.pdfIn PDF document text
    • http://pzhjintai.com/upload/files/54928142527.pdfIn PDF document text
    • http://simoncaulkin.com/images/16561583981.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/8484793211.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611a93dd946d4---67999411164.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f39ba96d7---78649637835.pdfIn PDF document text
    • http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/82874927744.pdfIn PDF document text
    • http://chapraptti.org/userfiles/file/kexowijufu.pdfIn PDF document text
    • https://treasurehunterdetectors.com/ckfinder/userfiles/files/27619490353.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/nojuxoziweginowofirup.pdfIn PDF document text
    • http://alarmy-kamery24.pl/userfiles/file/83681114991.pdfIn PDF document text
    • http://www.ks-klinika.ru/ckfinder/userfiles/files/nemifif.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/riseb.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16079e648dbad2---femofuxorepemisira.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f519346756---10970935817.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=monster+hunter+world+best+way+to+farm+decorationsPDF 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_off0000e25a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25A 18164 bytes
SHA-256: 84f240fab75679f9bd2a31d43b8333b40f6a8bfd9ba5d6033445ccbdee9535aa
font_01_sfnt_off00011186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11186 11172 bytes
SHA-256: 7886e6124d048ba7c70e584849ebdc1c162086228bc8a33b994ccafa85c94c11
font_02_sfnt_off00012b8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1