Malicious PDF — malware analysis report

Static analysis result for SHA-256 0765e5ab07245f41…

MALICIOUS

PDF

48.4 KB Created: 2021-09-05 11:01:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 0c6a3a7eef55e60e649111d3477e313f SHA-1: ebc867e1b84d155a6255a7b65dea0bca807f7775 SHA-256: 0765e5ab07245f4125e2d6142570d8ab2c901e40e85ff1082c64d515332979f0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier further support its malicious nature, likely for phishing or malware distribution. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5237

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://jf-orvalho.pt/userfiles/file/sikafokiwogagitokuwer.pdf In PDF document text
    • https://rjpexport.com/files/xurekiduvokopapijadup.pdfIn PDF document text
    • https://rumputhijau.com/contents/files/turotudegibimumapumifexuk.pdfIn PDF document text
    • https://appchecar.com/ckfinder/userfiles/files/zubesiso.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/susowukaretefa.pdfIn PDF document text
    • http://szzxwx.com/Upload/Upload/file/2021613811548775.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/aac85ae0e3b10d0bd9a040831ba444f2/bukozose.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/bemirasaguzoko.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b81050baec1---xagupigikibo.pdfIn PDF document text
    • http://alwaysfavorentertainment.com/clients/879371/File/jisixosus.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160708f08326e4---mosotalalexijobigekiw.pdfIn PDF document text
    • https://ghnservizi.com/file/2080790775.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/k9h0ufl4kf07gg1ejccqalom5b/81396016253.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/sunufosajamokoliri.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/c301bfbdd6d85d3e5eedaf6e3036de40/buvidivivoroposofali.pdfIn PDF document text
    • http://brickform.cz/obrazky/files/nogemufejapukuvubi.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608a5b7a85f5c---62565738843.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160855067ec2dd---83487265888.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/d05bc31a0cf2dff23107d1440aec628a/nivupebawoxepuz.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/6d3f7024e95002821bfaf0c38bc2b657/43523061665.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e8eaf5d039---luwogitodeboliresosa.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/78dff272c533e03070448a142b28bf92/liwote.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=letter+word+recognition+worksheetsPDF link annotation

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