Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4595d815e15fd4d…

MALICIOUS

PDF

54.6 KB Created: 2021-09-02 16:52:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 886ccac46c049bca9ca77845c5fc3c52 SHA-1: 9dc51e153f69ffdf4cf7a62ed36e6b6294f62401 SHA-256: f4595d815e15fd4d9aee58020cadf06ffda4898b75880421ee0361c17c5d183b
124 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ClamAV. Static analysis reveals it functions as a link farm, containing numerous URLs pointing to other PDF files hosted on various domains, some of which appear to be compromised CMS upload directories. This pattern suggests an attempt to lure users into downloading further malicious content or visiting phishing sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2746

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://oniceh.ru/uplcv?utm_term=teeteto+de+la+ciencia+pdf PDF link annotation
    • http://tieclangman.com/Images_upload/files/renixunipawo.pdfIn PDF document text
    • https://fwstc.in/userfiles/file/fiditenasuvinizog.pdfIn PDF document text
    • http://aedelsur.com/contenido/files/37974000893.pdfIn PDF document text
    • http://g-shocktou.com/user_file/file/jasudarupijugizaluwov.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/gv1inphltrmf1jg7gq1tfkj3o2/kasemomirurugarubasib.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16088051119b17---munatolitefidedi.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/401a7b96094d79522cd3c02255e1b726/daminavodojenefejidufuvu.pdfIn PDF document text
    • https://vetamblj.si/ckfinder/userfiles/files/seduwusolosozogi.pdfIn PDF document text
    • http://quaker1960.com/clients/3/34/346d0055920ff30d27c63167e405b0e7/File/75891289716.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/gefukuvewurififanum.pdfIn PDF document text
    • https://hssanesteban.cl/files/rokofazin.pdfIn PDF document text
    • http://thongthien.vn/upload/files/meriwonopimemeteru.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/29025063465.pdfIn PDF document text
    • https://comobrew.com/newsite/images/user_uploads/file/tekanodem.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fcd00a8764---rolased.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/97mn4ilf9rgpnemt4fbba0iigm/40603225070.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/xofuvopevuri.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/48aa50435f243865405514fc4614736c/xazumowezedovavu.pdfIn PDF document text
    • http://studiotecniconuti.it/userfiles/files/38106907701.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160881938ea680---94515119410.pdfIn PDF document text
    • http://thegreenlegacykeepers.com/clients/e/e8/e8dc17949b7ef813e9937e453902477f/File/97736020849.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021062706170973499.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ac765e78eea---95972571054.pdfIn PDF document text
    • https://faguaflowers.com/images/admin/file/34517437567.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/161157f0491fa7---xitomufevekepu.pdfIn PDF document text
    • http://doanekeyes.com/userfiles/docs/lexibikenepe.pdfIn PDF document text
    • http://alessandrobelleseveterinario.eu/userfiles/files/tuzesosawutenefomugagas.pdfIn PDF document text

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