Malicious PDF — malware analysis report

Static analysis result for SHA-256 7907daa818027e93…

MALICIOUS

PDF

54.7 KB Created: 2021-07-01 21:59:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2eb126c025e2ca2ce0c6f966ead32a57 SHA-1: 1dae7957e564577b618db71d119f13c3455e2648 SHA-256: 7907daa818027e93abfb8d569b040f5dd2f6199049bfa54b54e88ec182a7667f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to compromised WordPress sites and other disposable hosting, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5222

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 http://quangcaosms.org/media/ftp/file/zowujojokofekix.pdf In PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/b8d52d880f209c38b7a0e67999a9f7a3/86957245277.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160706c96dc8bd---wojipurebilovagunixa.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/sexuzawivupumusi.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/66175989164.pdfIn PDF document text
    • http://kleiberit.ru/files/file/13317680955.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/l6vus5omii3l9bkn8931lsjkvp/lixonebutasijig.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/6776143879.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071f9177545b---13780025680.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/99259827330.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/9411ac351325b6c904f5835e39ba3d78/2360464534.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/292rfr2jvgrh1dv46hte56adm7/sunizubituvarewuv.pdfIn PDF document text
    • http://wmhsclassof1977.com/clients/34196/File/41616449801.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a70089cb349---79185798290.pdfIn PDF document text
    • http://www.heksan.com.pl/file/80201422766.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/4pjdd71sf0dai8c92sr23a0rk8/54710732315.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/c6554a261149fd64ceb6f84478c6f40f/81049177307.pdfIn PDF document text
    • http://n2nlah.org/UserFiles/file/jezulitimefuwegebovi.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/d45b6c7621c6774bffd3634789156029/8846391885.pdfIn PDF document text
    • http://jcon-aps.dk/userfiles/file/4650527309.pdfIn PDF document text
    • https://tractorpulling-emmeloord.nl/upload/file/627865172.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/levjol4gk11d253ssq14dh9en6/58452365506.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/77698324974.pdfIn PDF document text
    • https://www.truegridpaver.com/wp-content/plugins/super-forms/uploads/php/files/129e56bfc4e3c48f48c846439fca1464/punokebegozanuwazemusomu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=missing+pdfmaker+filesPDF link annotation

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