Malicious PDF — malware analysis report

Static analysis result for SHA-256 c58257c9f98c9c5b…

MALICIOUS

PDF

44.3 KB Created: 2021-07-03 21:42:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 3f1de80598153c5ccdf5a23afc18e810 SHA-1: 50ddc1b2272fb045748e7d65f854f7c5306de406 SHA-256: c58257c9f98c9c5b548ffbb6b0f5c3acbda37d8a6bc1094fd7072f4f7c276792
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5294

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 44 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://queure.ru/uplcv?utm_term=real+name+of+boys+over+flowers PDF link annotation
    • http://sva-jeanroze.com/xmedia/file/20643035863.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/61302123861.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/tozuwusakokixup.pdfIn PDF document text
    • http://bienbao.org/uploads/files/tawuxoviso.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a8fd5962b---golivemopasatodolikereduz.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9d7f712cc---30182819325.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160a85bce3d967---pojoguzolowaxizujuritun.pdfIn PDF document text
    • http://2440027.ru/upload/file/98971807438.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160a284815aa8a---42471741013.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb608791f3---semuvopukaleritulotupux.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/5558f33d7afba7baf650c947ab3a5a8e/57000335607.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/19528121484.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b1e14348dc0---52796925544.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/23530299701.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/638b09c2e945b0a2feec4cdadfd2b0ca/kaxupexisenoka.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/biguxevozexus.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16076f37eb2d10---87975597608.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070385603478---68383840246.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8fbdf2964---73070639077.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/93233059804.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16083e3511b208---50043794990.pdfIn PDF document text
    • https://vresponse.net/userfiles/file/pebonagodisobug.pdfIn PDF document text
    • https://ksboutlet.com/file/files/67471298118.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1607ade753da5b---73299602756.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/779fd96aa3456b25d281854ddb9d7069/lexagitef.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/f0q5c0schai05c1jmbhi3nsqnl/bufasuj.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/bf0d7da17b445b1a8506f52ac27f4bfa/85582115899.pdfIn PDF document text