Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4697097ea163938…

MALICIOUS

PDF

70.3 KB Created: 2021-09-26 02:52:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d5195ed6a9913b044a37ffd297302272 SHA-1: f0653ef07df48e9bb9d4d17708983de3dbe8ae82 SHA-256: a4697097ea163938347f37fd81f75693b8aa75d8b5e9bff0fa4ba08c8cc49981
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous embedded URLs that point to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to facilitate phishing or malware distribution, aligning with the Spearphishing Attachment technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://irlanc.ru/uplcv?utm_term=how+to+turn+off+message+blocking+android PDF link annotation
    • https://www.highlandernepal.com/assets/ckfinder/userfiles/files/tikekuwago.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/babanaze.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16138e0793de0e---jobekegogiforivibubuw.pdfIn PDF document text
    • http://sungwoneng.com/upfile_editor/2021/files/bedilezukiwozotez.pdfIn PDF document text
    • http://akwarella.pl/user_uploads/file/roluwu.pdfIn PDF document text
    • https://hamayeshniroo.com/shop/file/bewudotupoge.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613f7ad314c93---74193249849.pdfIn PDF document text
    • http://myucmas.com/userfiles/file/xinipirodepexaxegu.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/504506458.pdfIn PDF document text
    • https://ikima.fr/uploads/file/vusofulawazoxepapin.pdfIn PDF document text
    • http://rotarylaspalmas.org/documentos/file/94298233686.pdfIn PDF document text
    • https://nstoplana.rs/ckfinder/userfiles/files/7904687900.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/c4555bc2ece3082ad53b8bece09365a9/gudidotosugubatararuwaje.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/f1ec4e63475aca5384781129c1d58437/ripodojapov.pdfIn PDF document text
    • http://ulleungroadtour.com/FileData/ckfinder/files/20210926_519267847F952A3C.pdfIn PDF document text
    • http://etpatatietpatata.com/userfiles/files/noxoxajitofafajeve.pdfIn PDF document text
    • http://xaydunglenguyen.vn/upload/files/6ec70e.pdfIn PDF document text
    • http://galsabino.it/userfiles/files/wumuxekevutinipigajigogo.pdfIn PDF document text
    • http://webinaris.eu/ckfinder/userfiles/publics/files/zopilosozaduweze.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/7997342754.pdfIn PDF document text
    • https://verredistri.fr/xmedia/file/sujenewom.pdfIn PDF document text
    • http://xn--80aap0abfiql8h.xn--p1ai/admin/ckfinder/userfiles/files/bodobibad.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/6344d3589a1172df2fbcc61cbdc7bd38/rilixug.pdfIn PDF document text
    • http://gccde.com/downloads/blog/geust/files/xuwezukevugetelogogawiv.pdfIn PDF document text
    • http://asia-test.informacittadino.net/media/files/15085454222.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_off0000b3c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3C2 14852 bytes
SHA-256: 68d70e21e06f7c009aa674d730ef775eb0a4d34e8be0363452adc8df98bf5aba
font_01_sfnt_off0000d91f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD91F 11228 bytes
SHA-256: 93b16c8d14a9fa7d5acbf5a6e331c710360c8f7ff2fa7792608de16647b2031a
font_02_sfnt_off0000f341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF341 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.