Malicious PDF — malware analysis report

Static analysis result for SHA-256 bff237eb15cff844…

MALICIOUS

PDF

48.0 KB Created: 2021-09-06 10:54:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a53d82cbe869477e5c09780971eb8bd8 SHA-1: 4fcb7861ab2585c9bcac3258150f2eb73bf78611 SHA-256: bff237eb15cff84458e29ab2201d6726e674e8f42604184da867d0642d5a0781
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and flagged by an ML classifier. It contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to distribute malicious content or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5740

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://cherryontop.pl/upload/fotki/file/rekanuvupugamavejesivab.pdf In PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/lfnamuk5fhs3r2tbu7tn4vc2ig/6702102072.pdfIn PDF document text
    • https://rzfmuhasebe.com/userfiles/file/zemitotajumifer.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/f57109cceadc5eb9c9cf197ccc0f4213/tikofavezutumusem.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160f17fc00dc1c---43116462594.pdfIn PDF document text
    • http://lhjmfamily.com/clients/5/5d/5d8645f74963a96e1aea25f3b610eff6/File/15843820209.pdfIn PDF document text
    • https://sitpchemcieszyn.pl/_sitpchem/file/jetexe.pdfIn PDF document text
    • https://hattshopping.com/admin/assets/images/ckfiles/19882685645.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/8781468886b96b5c2f3576c912f43151/wipemararodakati.pdfIn PDF document text
    • https://cabsfromheathrow.com/userfiles/file/19222030089.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/wijozunajobetedapivebaken.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7694644d5---vetebat.pdfIn PDF document text
    • https://peilimineko.com/userfiles/file/61740505011.pdfIn PDF document text
    • http://www.heksan.com.pl/file/81670020101.pdfIn PDF document text
    • http://dachastyle.com/userfiles/file/72630755901.pdfIn PDF document text
    • https://alternatifhirdavat.com/upload/ckfinder/files/35025009459.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/pufutelawasigibomeku.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082687c4057d---66960014287.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/5g2sojq4kt4mhqe51uqueli230/paditupumexotevod.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/e474039e630db0c1e9a322e101959a2b/xavuriwalumizozagilek.pdfIn PDF document text
    • http://deforma.it/userfiles/files/gunowivozipanuxodusuza.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e05fa00efbe---85135299538.pdfIn PDF document text
    • https://aeternoplanning.com/ckfinder/userfiles/files/6268422457.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c2851a79d9a---tajavisedupapibirid.pdfIn PDF document text
    • http://turhantur.com/turhantur/files/sovinajugewutoridor.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/jewakotabetuvijivoxe.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c917e3b173f---lavuli.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=non+performing+assets+thesis+pdfPDF link annotation

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