Malicious PDF — malware analysis report

Static analysis result for SHA-256 f630443e59f840c6…

MALICIOUS

PDF

50.8 KB Created: 2021-09-24 22:56:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: fa7f1fb7d458fddfbba2513e22a539cb SHA-1: 95fb3ba9938ce9cb577bc8a2ebde7d82dd6ea5c7 SHA-256: f630443e59f840c689c2552c8e86d07ffe3c317e2c0d09f1135cfad9f66392f6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the structure suggests it's designed to lure users into clicking links that lead to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6678

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://spherule.org/wp-content/plugins/super-forms/uploads/php/files/mqq4l4q9kg9b97fgtv1udkh5k7/kosifotajavamuvatanegur.pdf In PDF document text
    • http://kbautotech.com/board/datafiles/imagefile/57990240131.pdfIn PDF document text
    • http://kanoonkaraj.ir/dbmanager/filebank/htmlgallery/file///175004710.pdfIn PDF document text
    • http://ldkxzzs.com/images/userfiles/file/50565965469.pdfIn PDF document text
    • http://vektor-bezpeki.com/userfiles/files/wexujabu.pdfIn PDF document text
    • https://simon-daulte.com/ckfinder/userfiles/files/9289774850.pdfIn PDF document text
    • https://pmms-online.com/assets/file/63900304354.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/zasovafukidudokugos.pdfIn PDF document text
    • http://rwdwebwebdesign.com/img-aim/files/3706151375.pdfIn PDF document text
    • https://qfuse.it/images/uploaded_files/ckfinder/files/1631046075_69fa902d7c.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614874b0afed6---56374695014.pdfIn PDF document text
    • http://sb-78.ru/files/file/pojozisuborapiwadusivo.pdfIn PDF document text
    • http://armanetti.com/images/jekiwobopuselufafi.pdfIn PDF document text
    • http://wawa757.com/uploads/files/3468924555.pdfIn PDF document text
    • http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/83845123644.pdfIn PDF document text
    • https://hobbypet.cz/files/file/46190595341.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/aba3634c062dd6b76a4d57a2ae54957d/28643499048.pdfIn PDF document text
    • http://celyroknaterase.sk/editor_uploads/system/files/62069921280.pdfIn PDF document text
    • http://www.pantonerestauri.com/ckfinder/userfiles/files/dezajodoxifutagowoxezem.pdfIn PDF document text
    • http://harissarantis.com/userfiles/files/belatefud.pdfIn PDF document text
    • http://samnakthodrahassob.com/userfiles/file/xavupupagofef.pdfIn PDF document text
    • http://tiwtactic.com/userfiles/files/81244876862.pdfIn PDF document text
    • https://karatenarrewarren.com.au/ckfinder/userfiles/files/22438598645.pdfIn PDF document text
    • http://soskuwait.com/outscapes/admin/ckeditor/uploads/ck/files/kitezovip.pdfIn PDF document text
    • https://onutglen.com/caningest/images/file/4617018239.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/dc037e272e2a86640a4b15161fd98f43/revedugomebajefebepev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=diskdigger+video+recovery+apk+downloadPDF link annotation

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