Malicious PDF — malware analysis report

Static analysis result for SHA-256 6acc4c9941e7e13f…

MALICIOUS

PDF

70.3 KB Created: 2021-09-23 01:25:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: b6facfa520447bd2e979cd5061baf014 SHA-1: 2ce04ccedb6bc91b2459ff163cf5622d856745cc SHA-256: 6acc4c9941e7e13f520a7fb54396882be7eb601d3302b675083c1fd45e945926
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to domains that appear to be compromised or disposable, suggesting a link farm or SEO manipulation tactic. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. The primary function appears to be directing users to external sites, potentially for phishing or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5948

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/sndg5be90mjkvatp0d7lqt0fk7/foxufujovenufitere.pdf In PDF document text
    • http://csc0451.com/userfiles/file/20210905033606_etr21j.pdfIn PDF document text
    • https://stepweystudy.com/ckfinder/userfiles/files/3150635983.pdfIn PDF document text
    • http://meskerjager.nl/media/files/11030743106.pdfIn PDF document text
    • http://interwork.sk/userfiles/file/xovomibubumuxalimogodozal.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/161361eb417a62---najovavofuzagedezivarut.pdfIn PDF document text
    • https://www.puskinas.lt/ckfinder/userfiles/files/jolimozizurerurafutazogep.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/51988873839.pdfIn PDF document text
    • http://dagmar-e.de/userfiles/file/gotepokilenazatupepud.pdfIn PDF document text
    • http://jucal.es/images/file/gikasejiwuxalenukos.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/kd4olehemf06hvh7f0tijaqgl9/zovozexegujapirakol.pdfIn PDF document text
    • http://virtualcharityevents.com/vce_cake/files/files/bekebipemo.pdfIn PDF document text
    • https://marikakozmetika.hu/editor_up/xasovezowir.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/c8b8i30n1m3jfe4t14jh4kr36e/42286502768.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/161372690e4fe2---wuzevinofisijaro.pdfIn PDF document text
    • http://avrig35.ro/uploads/fck_editor/file/28851896624.pdfIn PDF document text
    • https://qfuse.it/images/uploaded_files/ckfinder/files/1631058401_bdb31282c0.pdfIn PDF document text
    • http://graciaindoutama.com/kingkong/userfiles/files/fozar.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/gavavefulilofadadaxa.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ubg2env8ufn22pjee0mkr06eh3/tatevexerokuta.pdfIn PDF document text
    • http://sake-tori.com/images/library/File/70461949270.pdfIn PDF document text
    • http://farmina.ru/uploads/files/93202882612.pdfIn PDF document text
    • http://yongqingtech.com/d/files/miwijebipulasolozamaj.pdfIn PDF document text
    • https://saksisan.com/upload/ckfinder/files/93473913495.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=postural+perceptual+dizzinessPDF link annotation

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