Malicious PDF — malware analysis report

Static analysis result for SHA-256 d713972c850d4a56…

MALICIOUS

PDF

52.6 KB Created: 2021-08-16 12:54:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ebd0a4b45494918d90a5d29e755da716 SHA-1: 5cbc36b8e01bddae51cf5d81d12f1a049bbfae2c SHA-256: d713972c850d4a5694b5b48cd3e1ed724cb5172c6fe9b8cf345dce9fb7c5c71f
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites, likely to host further malicious content or phishing pages. The document body is heavily obfuscated, preventing analysis of its direct content, but the heuristics clearly indicate a malicious link farm strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8815

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://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/34c968454c6df5421dbaa9b5b3d11053/xegebuledevu.pdf In PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e11af0803---tosatosuxadox.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160be241135261---konatudopovuxipuzo.pdfIn PDF document text
    • http://slsnn.ru/content/file/luguxosamifigibijukamuxid.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160777ebb34581---gaponasotab.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee4bbbbd743---movanujajepelivarejon.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160db7a5a92135---tepag.pdfIn PDF document text
    • http://jnafarms.com/clients/864068/File/jimekakujukolujikunugided.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a66f4daa8ed---81150086956.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-4-30/20210430202930929786.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/svh8d8cn3gen1jdmvfhcgca546/54119262442.pdfIn PDF document text
    • http://01host.ru/userfiles/files/tikozubap.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e153ac8992---siwusikedejijup.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles//file/xisokufunofupowazug.pdfIn PDF document text
    • http://masonlegacy.org/clients/61515/File/59331804097.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbf9f96248---91784457406.pdfIn PDF document text
    • http://www.rotudavid.com/ckfinder/userfiles/files/48079830985.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce0eec29698---pepozatebuxezobi.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/6c7d6740a6dda03291dc68324bdb434e/rudedon.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///bupoje.pdfIn PDF document text
    • http://myqself.com/upload/files/suzabumujifosezeju.pdfIn PDF document text
    • http://rentbucharest.net/images/userfiles/papaxapi.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc3a2858444---donowefogelawar.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/d4367964ebcd702e05a8561900df86b6/26440753030.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/951ea42de9d00f04b0402ddb1b156d27/pilus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=lista+de+precios+catalogos+cklass+2021PDF link annotation

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