Malicious PDF — malware analysis report

Static analysis result for SHA-256 b48f89fd517efed4…

MALICIOUS

PDF

69.5 KB Created: 2021-09-01 23:36:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a9e5d5ecb925384900160e692408a91e SHA-1: 40c3832adaa2dc277bafef6cb9d1a76d3ee11537 SHA-256: b48f89fd517efed479218e7c6ef487249a162c6b6354990df1d5c5941bdd0591
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a link farm designed to redirect users to various PDF files hosted on potentially compromised websites. The 'ML_NYX_PDF_MALICIOUS' heuristic and the presence of numerous external links, many pointing to upload directories of content management systems, indicate a malicious intent to distribute further malware. The document body, though heavily obfuscated, suggests a lure related to financial aid, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

Heuristics 4

  • 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://foodvellythailand.com/upload/files/43823217106.pdf In PDF document text
    • https://magyar-logyogyasz.hu/fileok/file/38528317542.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/nopapune.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/xivowikiguvelafalazuburu.pdfIn PDF document text
    • http://phpirateboosters.com/clients/867602/File/29916694541.pdfIn PDF document text
    • https://mcdelandes.ca/uploads/file/lobosikima.pdfIn PDF document text
    • https://volnynaklad.cz/data/file/dipodomopasososevomuzi.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/2uee0v8rgj94v5q056ktnhlrv5/kegapifimirasotum.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/gawiwavugel.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d15f01637b---filuzugosuvobadiwe.pdfIn PDF document text
    • http://hsound.ro/images/custom/file/ketalagelemogoguladipot.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2475736cce---gaxik.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611aaf963875f---62597399890.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16119ae2c29754---tebuwa.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021070815562973499.pdfIn PDF document text
    • https://noticky.net/akce/fotky/file/wogupom.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/92c294433425e10a18c6e00ef7647262/wamed.pdfIn PDF document text
    • https://supportsystemsvainc.com/home/ssvi/public_html/ckfinder/userfiles/files/wamisoxel.pdfIn PDF document text
    • http://photo-preiss.com/upload_files/files/powagenite.pdfIn PDF document text
    • http://newworldss.com/uploads/file/nukaxurinapetixip.pdfIn PDF document text
    • http://giasuthienphuc.com/Images_upload/files/32739847898.pdfIn PDF document text
    • https://conviviodihera.it/dati/upload/file/41926233593.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=student+college+grant+and+scholarship+aid+on+1040PDF link annotation

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