Malicious PDF — malware analysis report

Static analysis result for SHA-256 98d4ef273007abaa…

MALICIOUS

PDF

41.5 KB Created: 2021-09-26 18:09:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 447dfb36cc5d438cf72e3adb550a7657 SHA-1: 1ebb5efc3e652957301df58ca6c91dadec42f93b SHA-256: 98d4ef273007abaa045587e9d26acdcdfc785d11ed0f63447eae3301add7ac63
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, presenting a screenshot to entice users to click on embedded links. The numerous external URLs, many hosted on compromised or disposable domains, suggest a phishing or malware distribution campaign. The ClamAV detection and ML classifier further indicate malicious intent, likely involving the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7020

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 41 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://huntic.ru/uplcv?utm_term=highest+gb+mobile+game PDF link annotation
    • http://khojedu.net/userfiles/file/71952164312.pdfIn PDF document text
    • http://xn----dtbsgbucafmmaf.xn--p1ai/servimages/editor/files/jufigujezadeve.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1614847f37077d---tejatopitusi.pdfIn PDF document text
    • https://camelcarpet.org/d/files/lexonugatifix.pdfIn PDF document text
    • http://ekopaczka.pl/imgbrama/files/luvalufimikoxaxafifejivu.pdfIn PDF document text
    • http://pantanalmsnews.com.br/ckfinder/userfiles/files/tawufowa.pdfIn PDF document text
    • http://xedaphcm.com/luutru/files/nebesetabisa.pdfIn PDF document text
    • http://duetsepolno.pl/userfiles/file/11330367418.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161348abb66452---rebinuximezotisi.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/pobufodedotujusixa.pdfIn PDF document text
    • https://eagleegg5k.com/ckfinder/triplebuserfiles/file/92507426849.pdfIn PDF document text
    • http://edilgroupdigiovanni.it/userfiles/files/26505793604.pdfIn PDF document text
    • https://limberhurstgallery.com/imageuploads/file/pefuzofutudejebun.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614d25a28f91d---nukizesuleniniwapo.pdfIn PDF document text
    • http://viral-list-monster.com/ckfinder/userfiles/publics/files/50224399698.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612fcb2d721e2---17267418992.pdfIn PDF document text
    • https://foodexgida.com/uploads/files/visedogodojob.pdfIn PDF document text
    • http://pierrevillers.fr/mairie_files/file/jevupofuborikela.pdfIn PDF document text
    • https://12waktu.com/contents/files/54218907092.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/90rofd6rpdvophv26fp3dc3g77/dafowepalerumozakukimako.pdfIn PDF document text
    • https://coolinterier.sk/upload/files/72327496908.pdfIn PDF document text
    • http://avvocatogiuliani.it/userfiles/files/vujasuba.pdfIn PDF document text
    • https://bep.semmelweis.hu/userfiles/file/nuxutekiritimoro.pdfIn PDF document text

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