Malicious PDF — malware analysis report

Static analysis result for SHA-256 f11fcc5a6e3f88a0…

MALICIOUS

PDF

55.8 KB Created: 2021-07-20 13:59:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5dc65fc9f55fe7917d0326cc7267cbb0 SHA-1: b9749850ce870c692dbc07a5549f7bfd9f5bf7a5 SHA-256: f11fcc5a6e3f88a0f739209ca94757441a177a11b32c57374a13a0e1b591e877
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to external websites. Several of these URLs are hosted on compromised CMS platforms or utilize disposable hosting, indicating a potential phishing or malware distribution scheme. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8456

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://gruntbudowa.pl/files/file/93512738384.pdf In PDF document text
    • https://chetanaus.org/bheru/uploadfiles/file/guluwigijapufipidotowav.pdfIn PDF document text
    • http://biomisszio.hu/tmp/geleximu.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d172c0b5b5---junazapipukixuveman.pdfIn PDF document text
    • http://digjamaica.com/app/webroot/files/28105545440.pdfIn PDF document text
    • http://prospekt-rostov.ru/ckfinder/userfiles/files/gevapasakomuruteradop.pdfIn PDF document text
    • http://datavincity.com/uploads/ckfinder/files/werowid.pdfIn PDF document text
    • https://kcharp.com/ckfinder/userfiles/files/sapoxizitaxifuvapal.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a525039ed09---87253285089.pdfIn PDF document text
    • http://aifamilyreunion.com/clients/59202/File/sosapopewasijidovipopen.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a474c8f234e---futiwozajosaxeveboto.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/p6c1hn709f0klnlmk4cqk6g7rl/jitobotizatijeweliwob.pdfIn PDF document text
    • http://targdenunti.ro/userfiles/file/mabajalika.pdfIn PDF document text
    • http://climacom.eu/userfiles/files/79767144054.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/0e3f175a1e472b6d60a9e6ae662959e6/98374429701.pdfIn PDF document text
    • https://immo-macedo.lu/userfiles/files/telagenifos.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/86109276899.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160bbe6dda5761---83811594858.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608540acb2f2a---48858277022.pdfIn PDF document text
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607588086643a---dijeveru.pdfIn PDF document text
    • http://guchenes.com/d/files/82282925485.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab312395a58---98222385443.pdfIn PDF document text
    • http://netmode.net/app/webroot/uploads/files/ropiranivojowijelovatalez.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090ad5207b1c---zoxogadulijugukevixurumu.pdfIn PDF document text
    • http://jjinline.org/file_upload/file/xowipawedodemife.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=state+and+prove+gauss+bonnet+theoremPDF link annotation

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