Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e2e8e7248805c56…

MALICIOUS

PDF

79.8 KB Created: 2021-09-18 06:12:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 44d07a470c225e523dc9bf9c9e0081a0 SHA-1: 60f60d9692f7432de109e55507b07f3a9f6183dc SHA-256: 0e2e8e7248805c56a2a69d7eb75788f230c37422722e123e956799dce76bc5d0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous external URLs, many hosted on compromised or disposable domains, suggesting a phishing or malware distribution attempt. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM firings indicates a deliberate effort to obscure the true destination and leverage potentially compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://bagliodeimille.it/userfiles/files/wewukubibexabogoz.pdf In PDF document text
    • https://norservis.info/files/files/61408485017.pdfIn PDF document text
    • http://geoplan.su/userfiles/file/xibotanutokalosisiviz.pdfIn PDF document text
    • http://alicekhenrylawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bexesazixikepogaw.pdfIn PDF document text
    • http://yachtandgulet.com/userfiles/file/kisekuvugomagula.pdfIn PDF document text
    • https://funbugs.ie/files/file/69199194447.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/032c7ae99cde64db1dd8a7e76a239e21/vugawaboliki.pdfIn PDF document text
    • http://www.kingsmen-cmti.com/upload/files/80526884243.pdfIn PDF document text
    • https://textosl.com/upload/editor/file/lekudikigorimixozu.pdfIn PDF document text
    • https://architektor.ru/uploads/file/wikemosoxarej.pdfIn PDF document text
    • https://jaurrieta.net/USERFILES_JAURRIETA/files/92832065993.pdfIn PDF document text
    • https://jatransfer.com/userfiles/file/4211446530.pdfIn PDF document text
    • http://pentas.eu/userfiles/file/wotib.pdfIn PDF document text
    • http://salukool.ee/upload/userfiles/file/1201350865.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/83287209196.pdfIn PDF document text
    • https://viboot.com/ckfinder/userfiles/files/61426204251.pdfIn PDF document text
    • http://edu-soft.ru/site/htmlimages/file/pasevenonuziditiguto.pdfIn PDF document text
    • https://amigo-shop.105h.net/upload/files/83378487752.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/dca40805b2098c3cb4228ea34ede66cb/nakajuxovegit.pdfIn PDF document text
    • http://tatishev.ru/admin/ckfinder/userfiles/files/7169367260.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/94354368408.pdfIn PDF document text
    • http://degrossier.nl/uploads/file/2647325614.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef3792e5fd---24986273351.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=android+slow+chargingPDF 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_off0000cff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF9 18948 bytes
SHA-256: 0003b624a30047688550942fb973bb0e46046a3fa22b110a68b3293ed7627f07
font_01_sfnt_off000101d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D6 10484 bytes
SHA-256: 01e79ed3ee9ecd7ca545ed250c71ca75ed40622286861b7033506015c3ac6697
font_02_sfnt_off0001196e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1196E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1