Malicious PDF — malware analysis report

Static analysis result for SHA-256 75564c6007b3d9a1…

MALICIOUS

PDF

83.1 KB Created: 2021-07-25 16:42:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 17397dc39eeb509025dcf6b6eb5845cb SHA-1: f38e10c2453eb0d8534cc3410a53ac74d5db8d09 SHA-256: 75564c6007b3d9a14633ccf2fbcf4a35a7030e076feacaaf52ae9be9140f619e
154 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. Heuristics indicate it functions as a link farm, directing users to multiple potentially compromised or disposable domains. The presence of numerous PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM firings strongly suggests a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7584

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://empirepin.com/calisma2/files/uploads/rufumizolivi.pdf In PDF document text
    • http://ural-kip.ru/admin/ckfinder/userfiles/files/zoxivinetizigexizoxakun.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/7d5d34a2303f04138f1d6a63fc03becd/xexevamizomef.pdfIn PDF document text
    • https://diaochue.vn/userfiles/file/vowugo.pdfIn PDF document text
    • https://loctra.net/userfiles/file/dajoziwigajaxijono.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/811bbd55e14339b424cf330e027527a2/jeliwanegi.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c49a5a8a219---zujiwaw.pdfIn PDF document text
    • https://contactfm.be/userfiles/files/dazelaredoxebo.pdfIn PDF document text
    • https://olterus.com/contents//files/wenabapevupofinever.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/mevaponabufipem.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1c85565bcc---74050318884.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160897aa4d4af9---96769187669.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eee6f7b541---33874317456.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/ludufamabofu.pdfIn PDF document text
    • https://mumegram.com/userfiles/file/jogamerakozawa.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071cf17ace26---30668784956.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a8770176060---niwopetolaj.pdfIn PDF document text
    • http://liberty67.com/clients/41815/File/jorokoxavusuwinedetivid.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/968ajag101v8vhjuskus0au710/wuluwemaxodugapivowufo.pdfIn PDF document text
    • https://fuoriscena.eu/file/vixexewipitexa.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/23815617111.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd09cb3193---10393514247.pdfIn PDF document text
    • http://pozitron-s.ru/userfiles/file/zutorimozetiwukusavafu.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082aa157eae6.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=maplestory+2+gear+guide+2019PDF link annotation

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