Malicious PDF — malware analysis report

Static analysis result for SHA-256 a48fddb2a1ee8970…

MALICIOUS

PDF

63.6 KB Created: 2021-08-09 17:20:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 50f3763b7d4e1ceff065c17fe8ea1517 SHA-1: 84b6d6b9f44890f6c6e875fd6337120e743a1411 SHA-256: a48fddb2a1ee8970f70bfab12ba52cc8943a6906398d9a7758acde07330361b4
124 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ClamAV, specifically as a phishing trojan. Static analysis reveals it functions as a link farm, containing numerous URLs that point to other PDF files hosted on compromised websites. These linked PDFs are likely designed to lure users into downloading further malicious content or engaging in phishing activities.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4239

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://alexlunacoach.com/img/editor/file/7852949967.pdf In PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/2a1ccc9f9b3148b8b00c4ba851f54a87/67930410378.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16087180865e65---8985805096.pdfIn PDF document text
    • http://vce34.ru/attachments/file/muvowasufabaj.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/f49b513fe1266dab454cd8e38766c962/vosolivewaw.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/bf6eeac0bea5086ccf8d1b6b8ccba582/58491961090.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1607800eab4791---10868007130.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7dd0ae200---levep.pdfIn PDF document text
    • https://eastmanllc.net/ckfinder/userfiles/files/maxexibo.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c07509100c9---76550549685.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3be0aad828---35848341129.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086eae3d8109---nonijikeremaz.pdfIn PDF document text
    • http://chinalabware.es/d/files/nogirajuvevajowezotu.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/b532315fe0a61103cca52f2813a46b73/14472561684.pdfIn PDF document text
    • https://upbilbao.com/ckfinder/userfiles/files/ferefuxabodotudipoma.pdfIn PDF document text
    • http://sakaryakasaplarodasi.org/userfiles/file/rakokakowemisoxa.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/254d00ac6a9b8885f3b0a377c0fcf32f/xunalifi.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/33rne7oshcmqkra7p4t19r63s3/73333161888.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/55049379665.pdfIn PDF document text
    • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/86209556629.pdfIn PDF document text
    • http://chunmianxian.com/upfolder/e/files/20210703035225.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/215dc9bbe076e7d8fd195df72a0f6594/22946091918.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/c31e32c29a7d60b6d3e564d522320c1b/89741292006.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=wic+reset+utility+key+full+freePDF link annotation

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