Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef28c68f89cdb1a8…

MALICIOUS

PDF

66.4 KB Created: 2021-08-16 00:28:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 4b0888215e67d6eb0bf953a9c44e878b SHA-1: b559defd975c47670c7169ac4bcc27b0e74d6b5b SHA-256: ef28c68f89cdb1a878c82d44d4d74ebc21cb9a732a5f18a0db4eef115c22c0eb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure point towards an attempt to exploit users through deceptive links, likely as part of a phishing campaign or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6405

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 https://crewmak.ru/uplcv?utm_term=simple+synthesis+and+decomposition+reactions+worksheet+answers PDF link annotation
    • http://abw10thstreetne.com/uploads/files/37511227329.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ae7585cd34d---gukujapekibojil.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6182d00fde---ziziladixovetige.pdfIn PDF document text
    • http://candybeauty.vn/upload/files/56445123297.pdfIn PDF document text
    • https://aykutemlak.com/upload/ckfinder/files/noxisetazezovafabujokulu.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/d01dadc4faa6a590a0403c9535420ffd/44412660454.pdfIn PDF document text
    • http://podarox.ru/public/files/banusoliwulafol.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/20de63c99b3e991540270c5f71ce4ec2/jadapadupunadegagoga.pdfIn PDF document text
    • http://decamiones.com/userfiles/file/39786078019.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/44191175325.pdfIn PDF document text
    • https://komunalno-vrgorac.hr/files/bizenovemijigewawetezujo.pdfIn PDF document text
    • https://momsgardenfoods.com/ckfinder/userfiles/files/firexibokeraxapajevomuko.pdfIn PDF document text
    • https://kme.pl/global/app/webroot/uploads/file/16289565539064.pdfIn PDF document text
    • https://aedwea.com/upload/foto/mepawogoxenema.pdfIn PDF document text
    • https://soechi.net/userfiles/file/23666869122.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/9e71fb414575c1087022c59abe651a08/fusinapedutotiviseremi.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd2878b6b3---ligaxotusow.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/kaqtqvufseja720a8f0jp0goj3/zixox.pdfIn PDF document text
    • http://kasargod.net/uploads/file/71235610281.pdfIn PDF document text
    • https://bouveau-consulting.com/userfiles/file/56829842892.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/86840972437.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/eba62c2696a35b57d2dcbbad0a4a7cca/gozirebotelopexelov.pdfIn PDF document text
    • https://www.cosanuesa.com/componentes/editor/ckfinder/userfiles/files/guvosebugixonuwefinobujex.pdfIn PDF document text
    • http://ambvetfanini.eu/userfiles/files/6418049798.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160748591c7abc---mamamevaxegekefewozo.pdfIn PDF document text

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