Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7417e414343e5db…

MALICIOUS

PDF

84.4 KB Created: 2021-06-30 21:14:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 63efc0da86a41976828106bbf36a48a5 SHA-1: 18d315e8054606af0e08a666dd60751b3a175687 SHA-256: d7417e414343e5db6358ac6c1ee0e74838f0babe67c3d35bb34e662f33a921e0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links likely serve to redirect users to malicious content or phishing pages, attempting to trick them into revealing sensitive information or downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://cructi.ru/uplcv?utm_term=outcomes+upper+intermediate+students+book+answer+key PDF link annotation
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0a1d266fa2---luguwopaporososemaxi.pdfIn PDF document text
    • http://vdadanang.vn/app/webroot/assets/files/95567810437.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160920e4b457df---zufenufovem.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/ledotixigisaripewogijol.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/benilijoro.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/7atgdu8vcmrn9mp4nb6dqanfu1/59412455833.pdfIn PDF document text
    • http://posekatzahradu.cz/files/file/ketufavuno.pdfIn PDF document text
    • http://greenbrier101.com/userimages/90908301628.pdfIn PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/masaboxujobusubufaxabimi.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/95018b92afca1e34bec68bfe91f4e3b6/dizekigupenezaromadufinu.pdfIn PDF document text
    • http://theofficefurniturestore.com/ckfinder/userfiles/files/86455888168.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160848ad512814---ruriramotupaparugo.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/tuxaxowulorinakejuluj.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160811f52c4735---logapevozojo.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/a7edbed12b2404d0fb5ddb0c5dc7a5e0/pusowat.pdfIn PDF document text
    • http://skylineidaho69.com/clients/c/c7/c7306e0a9cc1d421caefa9c307ca601f/File/11107646602.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/ae7638ff06491cd110fe00f6049b7f77/pisuralibape.pdfIn PDF document text
    • http://claphamtaxi.com/survey/userfiles/files/66836338328.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/3f709d03858bb3a246c12466da6e1b58/52972088907.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/52274913626.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc8f2f90aba---pufawanozobijizotuxarub.pdfIn PDF document text
    • https://glycocalyx.nl/userfiles/image/file/57431530239.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d84a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD84A 11188 bytes
SHA-256: 572ef8741e8503dde03fe50cad3ad4d617729605f9520936102ecb552288a994
font_01_sfnt_off0000f25c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25C 22928 bytes
SHA-256: 25ec1e2c5a24fca4ba69b59cd174cf1522d04f36395ee4dd646d56341b17d946
font_02_sfnt_off000129fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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