Malicious PDF — malware analysis report

Static analysis result for SHA-256 89d0d5d76ff224bb…

MALICIOUS

PDF

83.4 KB Created: 2021-09-07 21:32:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bf23b37271e47ff705636e267e5d29f3 SHA-1: c72f6ebd5a51aa57d286a975088aa29ee1708dd5 SHA-256: 89d0d5d76ff224bbff8f737dcea934154f6178ee650352d24c0c8ecb90d86413
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to numerous URLs, several of which are hosted on compromised WordPress sites, indicating a potential distribution point for malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent. No scripts were extracted, limiting the analysis of direct execution vectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • 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://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/sajilatepuwanowopar.pdf In PDF document text
    • http://dainichiji.com/upload_ckr/files/29040095186.pdfIn PDF document text
    • http://verkaufs-akademie.com/userfiles/file/lexisitaxonibud.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160987aad2ef4d---xibusabimewanif.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1609e6496aebc7---jawogokonipuvawif.pdfIn PDF document text
    • http://safetyassessmentsolutions.co.uk/ckfinder/userfiles/files/pebekesodaxezixikova.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/dafidumijuwemipunisuzod.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/eovho2oaku14t9n57caku19rln/20301209240.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610bf3fbdeaee---bevezi.pdfIn PDF document text
    • http://minipit.com/data/files/datuworavazojad.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1d0ba4693---79733457481.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/tivasob.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/sudugosavirosuxovepisi.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/f54b302111f3629cbcbfac723fe45355/47618931580.pdfIn PDF document text
    • https://vnsteeldetailing.com/UserFiles/files/7144867250.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c680524f4e---63747580329.pdfIn PDF document text
    • https://multimetrics.com/ckfinder/userfiles/files/25647048453.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/sefojajedixowema.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/texarubone.pdfIn PDF document text
    • https://shinko-tw.com/UserFiles/file/77138987371.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/95810a0d366db6471286f6bd9bf727e7/60043510599.pdfIn PDF document text
    • http://stattus.com/assets/file/55245870538.pdfIn PDF document text
    • http://hanasushichoice.com/uploads/files/jedifimema.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/27f513985f4983e7f603285f786d9509/kawusavegowapodupu.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/161268ef593828---gosibovomezobu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=casio+g+shock+3229+instruction+manualPDF 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_off0000dd31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF548 11228 bytes
SHA-256: 970209a0716c27a572a23a6d002430913b3c8b68711b9eabeb5a215384788112
font_02_sfnt_off00010f87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F87 18868 bytes
SHA-256: 1078b6e5588fb6404b46ac7a8ae2697499806afea356c64d35145357810e915a