Malicious PDF — malware analysis report

Static analysis result for SHA-256 d64ba6386bc435f6…

MALICIOUS

PDF

41.0 KB Created: 2021-06-27 17:20:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: bc31346e820172026e0e4b2729328a28 SHA-1: c1114787aec4b26bc195a43e694e06cd64a3c71f SHA-256: d64ba6386bc435f64fc44692482a35600ee5411bad54e141f2b3483a87338d4e
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size and image-heavy content, typical of a screenshot designed to hide clickable links. Multiple heuristics indicate it functions as a link farm, directing users to various compromised websites and potentially malicious URLs. The ClamAV detection and ML classifier further support its malicious nature, suggesting it's used to deliver a payload or facilitate phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7798

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 40 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://pixomot.ru/uplcv?utm_term=mountains+and+basins+climate PDF link annotation
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2d3e28ecf---79719811872.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/dodabopuwonapusasedakom.pdfIn PDF document text
    • https://akemi.ro/hirek/file/55752163197.pdfIn PDF document text
    • http://meskerjager.nl/media/files/30973663838.pdfIn PDF document text
    • http://cityhelps.org/clients/6/61/61afa7a028a8e04f14432b0fece6f2b0/File/pugufitekujuwexaselone.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/95091550000.pdfIn PDF document text
    • http://ondrejkocar.cz/img/file/40130003972.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160c95f7deaf86---fazuwaz.pdfIn PDF document text
    • http://edanieltour.com/FileData/ckfinder/files/20210624_F57CAC7C9A4DAF59.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160d79f1619581---vabukuki.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-5/file/tawemerefojit.pdfIn PDF document text
    • https://monuments-msk.ru/wp-content/plugins/super-forms/uploads/php/files/4868f8ec86b89c9f1bed153520005f95/fonivizesamali.pdfIn PDF document text
    • https://condicionamentofisico.com/arquivos/file/raxabalem.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160bc96180bcc0---kokejufi.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/9277abf99e9fec4896db548d369cfc3c/60809064228.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/ac9e2601204011051846641425ea8262/wobomidufupuxufamirujabid.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/600ea0a0d27d4f503bc2f5599317cbf4/61501398373.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f7e492fc6---zojogolizufaliv.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/seboxilazaj.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a5701a7e51---3633930095.pdfIn PDF document text
    • http://karmand24.ir/basefile/ehotel724ir/files/visun.pdfIn PDF document text
    • https://yepsell.com/userfiles/files/gezebolojesala.pdfIn PDF document text

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