Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec83e2545da81b70…

MALICIOUS

PDF

58.2 KB Created: 2021-09-11 17:50:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 23cf7679b2955e95ab4ab8a18bdcc11b SHA-1: 708b2799ce920ed6210c8b430760af66119d2c19 SHA-256: ec83e2545da81b70be7f52e08a7ca71bc9b7fd8235a106d5bf53669f3d250f82
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ClamAV. It contains numerous embedded URLs, many pointing to distinct domains, characteristic of a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior. While no scripts were explicitly extracted, the PDF structure itself likely facilitates the redirection to potentially malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4143

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 http://www.lovebliss.tw/UserFiles/files/37676286732.pdf In PDF document text
    • http://dulichtantai.com/files/uploaded/files/40425155476.pdfIn PDF document text
    • http://cornaredo.gattinonimondodivacanze.it/themes/userfiles/files/75475950147.pdfIn PDF document text
    • http://sweepinstyle.com/userfiles/file/45759842153.pdfIn PDF document text
    • http://deaprogettazioni.it/userfiles/files/16685987500.pdfIn PDF document text
    • http://testplanet.nl/uploads/files/mapelojogoxewule.pdfIn PDF document text
    • http://magicfood-cn.com/files/20210905091432.pdfIn PDF document text
    • http://helderlive.nl/ckfinder/userfiles/files/tolugozeroxo.pdfIn PDF document text
    • https://kalashad.com/userfiles/file/goboreziwokonomome.pdfIn PDF document text
    • https://cuatudongsaigon.net/uploads/files/suzegadefaxodarep.pdfIn PDF document text
    • https://namratalakhotia.com/userfiles/files/juzevavetexap.pdfIn PDF document text
    • http://nakloboucku.cz/uploaded/file/18610951444.pdfIn PDF document text
    • http://italiangreyhound.pl/img1/userfiles/file/90159405747.pdfIn PDF document text
    • http://solmoda.it/userfiles/files/papule.pdfIn PDF document text
    • https://cuatudongsaigon.vn/uploads/files/18105146379.pdfIn PDF document text
    • http://agroanaliz.by/upload/editor/files/69745809470.pdfIn PDF document text
    • http://sellmysayarah.com/userfiles/files/nexerawawemefesajud.pdfIn PDF document text
    • http://alhegazgroup.com/userfiles/file/sagafugutozerumas.pdfIn PDF document text
    • http://splogservice.ru/content/files/58161495214.pdfIn PDF document text
    • http://elektrostroy.kz/ckfinder/userfiles/files/lomidepasamorepajizo.pdfIn PDF document text
    • http://sungwoneng.com/upfile_editor/2021/files/1370747933.pdfIn PDF document text
    • http://taiwan-tsai.com/upload/files/vuwovimebifepilibomafafip.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132009c27dc4---30650952980.pdfIn PDF document text
    • http://ordineveterinarivenezia.eu/userfiles/files/gatelux.pdfIn PDF document text
    • http://byecook.com/ckupload/files/20211656245.pdfIn PDF document text
    • http://himalayakebab.irafbrothers.com/shipinc/userfiles/files/38216524224.pdfIn PDF document text
    • https://www.barrau-philippe-sedeco.fr/ckfinder/userfiles/files/82200792063.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=best+ebook+reader+apkPDF link annotation