Malicious PDF — malware analysis report

Static analysis result for SHA-256 2da466c7be6f0873…

MALICIOUS

PDF

81.4 KB Created: 2021-09-01 09:48:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 93b011729aba07079fab92866a3284cf SHA-1: 301ede807e2716f4b73c9d455c6b3d60a48406ae SHA-256: 2da466c7be6f087327bfb7ee3863fd75e0c658173fc68592da14bd0b8792148a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, possibly exploiting PDF vulnerabilities or serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://philabc.ru/uplcv?utm_term=use+of+goto+in+c PDF link annotation
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/0eb70f773c71bfa4d9f4532b85666cb7/lexoneruwegugetokimif.pdfIn PDF document text
    • https://hgb.se/filer/file/99816127477.pdfIn PDF document text
    • http://rubivina.com/Images_upload/files/jerigeje.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f4e5a8aac---67015732950.pdfIn PDF document text
    • http://mvclassof1990.com/clients/8/8c/8ca0ba2c7a07c5cd1f21f9fc323c16c5/File/43957312395.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/17587054131.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/kaximinesi.pdfIn PDF document text
    • http://educasters.co/ckfinder/userfiles/files/57365462298.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/a01a06d6f4d305fe435da7ebd102c12d/72488209715.pdfIn PDF document text
    • http://vagtteam.com/userfiles/Files/kekafeveni.pdfIn PDF document text
    • http://xn--h1acbpobggs.xn--p1ai/data/files/demoligilosofogavabukev.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/9f5eceae3bc6a7c4ad66cadbb3548e9f/45888281202.pdfIn PDF document text
    • https://www.bramfordgc.co.uk/ckfinder/userfiles/files/namuxilelozum.pdfIn PDF document text
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/45210326198.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/40646102785.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/gikufopalavizupexixiji.pdfIn PDF document text
    • http://kosmonautika.ee/ckfinder/userfiles/files/12876002981.pdfIn PDF document text
    • http://crmrealty360degree.in/userfiles/file/88734122782.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202104/file/29286673721.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4547b34abe---20793086145.pdfIn PDF document text
    • http://ronaldtan.nl/images/photo/zumelekafonux.pdfIn PDF document text
    • https://www.mmgrowersg.com/ckfinder/userfiles/files/80160313169.pdfIn PDF document text
    • http://www.sictombbi.fr/ckfinder/userfiles/files/59185145001.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c62b32fce8---nivuxezuvize.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/61544391892.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160b4bf62a79aa---katawetomojizexipanur.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/50740893025.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_off0000dbd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD0 10212 bytes
SHA-256: d862499ed02fd02a22c9410fee269422b25182639ff41efc17a28033c0a94099
font_01_sfnt_off0000f2e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010af3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF3 17008 bytes
SHA-256: 5fa9b4887f0da8443419f3962f578ea79ade23e176d486cbc4ffd9fd7b6f31d0

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