Malicious PDF — malware analysis report

Static analysis result for SHA-256 767ee50fcba243c1…

MALICIOUS

PDF

57.5 KB Created: 2021-09-07 23:22:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 4baa4a910bc18e75b13fac7d328959ea SHA-1: 8a12364edbe8f9fd75323e24a888d8c854100f8c SHA-256: 767ee50fcba243c1c290dd881167603a9cfafa7797fec140f5c3f0881cfbbb1e
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of external URIs and link farms suggests an attempt to redirect users to malicious sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5046

Heuristics 5

  • 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
  • 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=6th+grade+math+worksheets PDF link annotation
    • http://abwrichmond.com/uploads/files/futinaliberuzibunobom.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df32f47af48---14881520967.pdfIn PDF document text
    • http://benthanhsgfarm.net/images/uploads/files/dodufemuxuket.pdfIn PDF document text
    • http://goodtraefarm.com/ckupload/files/84092624901.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/io2cpvpkrdg5gtg2a4384bp5ad/pirokazutonodokufixewa.pdfIn PDF document text
    • http://i-dron.cz/data/file/47661664966.pdfIn PDF document text
    • http://tylincms.com/userfiles/files/xejopodabefopipaluvo.pdfIn PDF document text
    • http://debandhelder.nl/ckfinder/userfiles/files/93467184248.pdfIn PDF document text
    • https://study4student.com/cache/fck_files/file/luzelijevisegavile.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/nqs0vcnal49nhonev9p1dtrfq7/gaxebipapadupugasajox.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/03b71d0ed3f3980b1bcc0f96ad3f57e7/16681549716.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/eb0ea44c688eaf7bd17df116ba986374/28164277611.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/46v12pg7i62l19blh2st2euld0/bureradu.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a0cb44d622f---gafulufoliromapizuzeve.pdfIn PDF document text
    • http://www.sec-ollivier-associes.fr/www/upload/file/rogazudojomitisarefixa.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/wezomirigedamikugekuzujog.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609768bac0bc0---42531461718.pdfIn PDF document text
    • http://henrycrawfordreunion.com/clients/1/19/1929e20d1ffebcad6d8b2a659e9c170d/File/75375212051.pdfIn PDF document text
    • http://klimagra.pl/images/wysiwyg_img/file/zekufarajamerabugokamuxi.pdfIn PDF document text
    • http://imobiliariaimperio.com/files/files/korixiwoxi.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/c9190ed12133ce1c2bf1f0deea9f046b/nanabegidojekijivosidodez.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/14623170773.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/44569048644.pdfIn PDF document text
    • http://drapa-technika.cz/UserFiles/File/2238223870.pdfIn PDF document text
    • http://oxigensupplies.com/shipinc/userfiles/files/lafuxuza.pdfIn PDF document text

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