Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eb978fea0865e91…

MALICIOUS

PDF

46.8 KB Created: 2021-09-17 13:50:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: cbb5336d480dc79d0b6518a791a2a23e SHA-1: 99f4cf349676dfdfdcc9e2d194da309c815f04d8 SHA-256: 3eb978fea0865e91dfcaae09d94510ac8f305c6a7038ff20a23225c324245ce8
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be disposable or compromised hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm strategy, and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' suggests the use of compromised WordPress sites. ClamAV detection and ML classification further support its malicious nature, likely as a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9202

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://inwebjor.ru/uplcv?utm_term=super+smash+bros+emulator+android PDF link annotation
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/sasagujekano.pdfIn PDF document text
    • http://mylodge-naoshima.com/images/blog/file/tedazosetal.pdfIn PDF document text
    • https://umartravel.com/files/sepakezi.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16133d95085ecb---59628867256.pdfIn PDF document text
    • http://attlas.center/userfiles/file/76639908722.pdfIn PDF document text
    • https://gkscam.com/userfiles/file/lapedewusesow.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/f8950fd580b080aa047a93e2d57a3cd2/dazezefotebubo.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/tologelopunezum.pdfIn PDF document text
    • http://annabarons.com/files/files/89084728122.pdfIn PDF document text
    • https://mabuksusu2.com/contents/files/27122234979.pdfIn PDF document text
    • http://8njl.com/userfiles/files/76949288660.pdfIn PDF document text
    • https://erdemlerkoleji.com/resimler/files/karetuwisiwunane.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/toxukazizaros.pdfIn PDF document text
    • https://linhquan-group.com/upload/ck/files/jobinobowifutojumotesipo.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/a703ed042bcbe18db57e8888c0508d61/zeluxofitujofuligu.pdfIn PDF document text
    • https://ingatlanfelugyelet.hu/uploads/file/xezonogufev.pdfIn PDF document text
    • https://strongpointmarketing.net/userfiles/file/65149639628.pdfIn PDF document text
    • http://apvn.info/userfiles/file/lakodakonabakilur.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161399320ddbc5---5541555965.pdfIn PDF document text
    • http://www.drivingschool-brno.cz/files/files/24002523361.pdfIn PDF document text
    • https://taumed.kz/upload/2021/09files/210907185031900534n8agw.pdfIn PDF document text
    • http://rebizplus.com/userfiles/file/42285329952.pdfIn PDF document text

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