Malicious PDF — malware analysis report

Static analysis result for SHA-256 19b3c80a7974e94f…

MALICIOUS

PDF

45.3 KB Created: 2021-07-08 11:44:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f07272ca701b8a35f237972e731156ca SHA-1: efe3f6da5ffd12d6943a5406a0e29a4b1c6c9430 SHA-256: 19b3c80a7974e94f0e6e999ddda8e263e136e6629626a668c81fa8febc6d68d3
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or malware distribution attempt. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm to redirect users to malicious content. The presence of external URIs and link farm heuristics strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5654

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://ketchas.ru/uplcv?utm_term=can+low+coolant+cause+rough+idle PDF link annotation
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1608dfc3dad460---86573332092.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c5b30d460e8---tibitebixopu.pdfIn PDF document text
    • https://la-klamm.org/userfiles/file/xevul.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4871c3efd7---kuwowiragepu.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/0f5b525ce279584f95c00f8493589ebe/zarifavagiki.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160ac723ccd56d---xixexikol.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd96812d64---bugukobugeduxiwuzorolovum.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a48238b418---bapevubiwagudude.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1609b22914dca1---26903193904.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/fofj66v7f8gqonp2tpm4ejdgmv/worilofif.pdfIn PDF document text
    • http://hornets88.com/clients/56662/File/16649312234.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/ad739410gp39ah3g10v6387u8a/95416817331.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/a9cc93090689d9cb0a3dccd2382afc7c/73307911400.pdfIn PDF document text
    • https://puntoagricoltura.it/file/vebakididurirevugasabe.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/e74ff405f938a98a732376c719bfef0f/lobakivov.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/76467867696.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccf5f4e5fe---lojesasibepamobepamowozuk.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/2f0c434bcb78a59910c7e3b7d2642648/41835553104.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/c6c5bdad0152a8186d38dd14708d5574/narezositezinuzotuman.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/ssbf47j9nk6e5gvj65hoa1mp7u/98765699864.pdfIn PDF document text
    • http://thanhlapcongtykiengiang.com/upload/ck/files/sakirevedidojekavoxe.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/31c296fkhugfh89mfd39acrg10/17209821524.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f72450546e---kaxovenuxulofidiseluf.pdfIn PDF document text
    • https://charlesstreetvideo.com/userfiles/file/nuramopuxojivija.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/90b5cdf885616feed97918435760e478/16292250452.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d53db404f20---wuguwezemi.pdfIn PDF document text