Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b30edef79955556…

MALICIOUS

PDF

64.0 KB Created: 2021-09-23 19:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: afe0209a48049b96af766ec211bfdc10 SHA-1: 4e2cd3632a0e7f67c21b22b11ccbf13de5ed9649 SHA-256: 5b30edef79955556f762f4436230170d53fa201ec2016689b3fd82d01cab9a52
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs pointing to a link farm, indicating a phishing or malware distribution attempt. The PDF is likely exploiting a client-side vulnerability to redirect the user to these external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6381

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://stotex.rs/files/64426495942.pdf In PDF document text
    • https://shevian.com/images/file/lugimifasudujuxesojem.pdfIn PDF document text
    • https://pierrelemagicien.com/userfiles/file/69493832357.pdfIn PDF document text
    • http://fuguchair.com/upfolder/e/files/20210902064633.pdfIn PDF document text
    • http://ingpiazza.eu/userfiles/files/9853867340.pdfIn PDF document text
    • http://webinaris.eu/ckfinder/userfiles/publics/files/xerixoxubuveme.pdfIn PDF document text
    • https://phuquiland.com/upload/files/49845577320.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614906adca229---besaragi.pdfIn PDF document text
    • http://erisalaw-chicago.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/joxorifibozuvasupafol.pdfIn PDF document text
    • http://esteticka-stomatologie.cz/files/content/file/wimumigurokopivuwexoze.pdfIn PDF document text
    • http://leebyenghun.com/new/upload/board/files/gegiferazijekaleropixezok.pdfIn PDF document text
    • http://villaelen.it/userfiles/files/2069874606.pdfIn PDF document text
    • https://highfieldhousehotel.net/nbloom/fckuploads/file/20203828924.pdfIn PDF document text
    • http://chapelguild.com/images/usr/bawasakuloruj.pdfIn PDF document text
    • http://energcomb.net/cms_enercomb/sgi_userfiles/userfiles/files/5052105180.pdfIn PDF document text
    • http://viswinkelindex.nl/images/uploads/50201200549.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/gozaxuroluvukegibaja.pdfIn PDF document text
    • https://mywayrtk.com/userfiles/file/tirepokoturetipa.pdfIn PDF document text
    • http://harringtonassociateslaw.com/Test/JabzMedicalBillingService/userfiles/file/70214026309.pdfIn PDF document text
    • https://gertiesbloomers.com/kousumi/nulook/upload/fckimages/file/vudupozu.pdfIn PDF document text
    • http://kapfenberger-schuetzenverein.at/userfiles/file/42967579335.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/33085060575.pdfIn PDF document text
    • https://terlickodds.cz/www/www/fckphotos/file/78740648038.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021090719531273499.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=largest+island+countriesPDF link annotation