Malicious PDF — malware analysis report

Static analysis result for SHA-256 df55a200aebe1416…

MALICIOUS

PDF

62.3 KB Created: 2021-09-19 08:23:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: d5a74a5c7933fa4c6b91e396ec3628a4 SHA-1: 6b4fc8e8b72eb9b3f2dedc8f4abf7247cc261027 SHA-256: df55a200aebe14163216787831434034e5138f36f852051ebdf4da46b99d5a93
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to external sites, some of which are hosted on compromised WordPress installations or disposable domains. The presence of external URIs and link farm heuristics suggests the document is designed to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5048

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://garglob.ru/uplcv?utm_term=add+to+lr+apk+download PDF link annotation
    • http://lynxitservices.com/ckfinder/userfiles/files/15980141683.pdfIn PDF document text
    • http://flomojapan.com/upload/files/fofijefakexunutuzoza.pdfIn PDF document text
    • http://kiapelhrimov.cz/UserFiles/File/4474897226.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/memajog.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/8abe94cf3b6771c51aff038776c869c9/41510641006.pdfIn PDF document text
    • http://emannsltd.com/userfiles/kulusali.pdfIn PDF document text
    • http://skonasystems.com/userfiles/file/14222465090.pdfIn PDF document text
    • https://renesens21.com/ressources/upload/files/puxawopunawarifiwivi.pdfIn PDF document text
    • http://soleilboo.com/images/uploads/files/gijepedonas.pdfIn PDF document text
    • https://felicitareonline.ro/ckfinder/userfiles/files/jusuromofurenururexasegew.pdfIn PDF document text
    • https://yocarbroker.com/upload/ckfinder/files/80359406643.pdfIn PDF document text
    • http://sonarkella.com/userfiles/file/ramanuvejezebivone.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16139301e3e3ba---19217531077.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613def9b10a7c---vonaluxi.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/ecaad8ed9fde9ff0471ad63c32077403/nokiwixowisemexisatuzeluv.pdfIn PDF document text
    • http://buydecor.ru/uploads/files/sadosaverefi.pdfIn PDF document text
    • http://nktrading.qa/file/files/42555838893.pdfIn PDF document text
    • http://veszpremlizards.hu/_user/file/41610109511.pdfIn PDF document text
    • https://worldcastlive.com/userfiles/file/tazovuxupudujariwerikixej.pdfIn PDF document text
    • https://www.naabelectric.com/userfiles/files/xijoripoveguzuz.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/1gdehjjmpqmqf3bj0h9ns1e4u3/linuxa.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/74215007051.pdfIn PDF document text
    • https://festacontinua.it/public/file/zudosumodev.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/golekimomukutugazar.pdfIn PDF document text
    • http://phutungotodungha.com/img/files/kurujavelujawim.pdfIn PDF document text

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