Malicious PDF — malware analysis report

Static analysis result for SHA-256 457b70a2fd4bbbbb…

MALICIOUS

PDF

150.4 KB Created: 2021-06-25 20:09:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 3f4fd788794ed47d10c37a9f501c5889 SHA-1: 15ee77ea3f9274ca220bc0f8f90358d06bf68e4e SHA-256: 457b70a2fd4bbbbb870d02d0e6f58147b01a01fcbf7702279dfcf0e33be5a46e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous embedded URLs pointing to compromised WordPress sites. The primary purpose appears to be redirecting users to potentially malicious content, aligning with phishing or malware distribution tactics. No scripts were extracted, but the structure suggests it's designed to exploit user interaction with the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9708

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://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/sedcfmr16j12u45ntdsi9mkdrc/xazuwukiwowi.pdf In PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aecf395a4d2---39626847844.pdfIn PDF document text
    • http://murphysbeads.com/clients/54316/File/dafuzurum.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/5aa26acfe3fd0112a7138e184b182a84/setodafux.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/32685806037.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e5cfdcf84---lezufixeninodojixosovupal.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a43e4298bcc---bebuzelelusodugexex.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160afa50abd16a---fuwojalugepufik.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160944e8d5362f---bofated.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/31ca820825228118d801eafe87b4b79f/48988734663.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b99e3cf06f5---22789815985.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c79bbb75c4---79206414472.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/9a3f941d61e2c37eff92c49d8459b7d3/15227343424.pdfIn PDF document text
    • http://faxik.ru/ckfinder/userfiles/files/gakasuwasojunuporokufe.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/c69d04d1d7bf8c73d98386c9cafd3e1c/niwagiwafo.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff8889f9b8---kogukudojedibewo.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/2d790ca19868cb1b02698c977a83d73c/zevetexosipezujulasodi.pdfIn PDF document text
    • https://dm288.com/slicice/file/34685755060.pdfIn PDF document text
    • http://rauvuonsach.com/images/uploads/files/vavipuxovunu.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/470415dm963t85kv3kj2fn6gdb/janifider.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/vmfo33thckiihjdhhg1ae1rar7/fexatajoritelulegazagibiz.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/qlhar50qj4vgrnbgs7lg7o1k2l/kukibediwip.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16083dd030b316---mosedamogelinabakov.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa0650293f---pomoturedelofamifima.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/eb7ec40dc1839d5a25854d094b75bb35/nebelefitesafajo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=tcp+and+udpPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f93f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93F 16480 bytes
SHA-256: 21584f2d5ff8ac6bd47ef6b597829ffbfa2cccf0190dea74b497e7a01781e543
font_01_sfnt_off0001247e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1247E 99704 bytes
SHA-256: 960132e3b96b7448b91c0a65ac9ea36d4554018add1eca850e9e87ba7581c4b8
font_02_sfnt_off00021c04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21C04 9812 bytes
SHA-256: e405c88fffde3147a818390c8a3ff7571ad4b34b27f267415bed581be68dfa4a
font_03_sfnt_off0002319d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2319D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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