Malicious PDF — malware analysis report

Static analysis result for SHA-256 edd3a168b55e0a35…

MALICIOUS

PDF

58.3 KB Created: 2021-06-09 08:17:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 041fdcc4a01540533282f278dbdfd1d2 SHA-1: 37938194350c05b5c3705488f1d1984207c55447 SHA-256: edd3a168b55e0a350fa2ade95f6e4cc62ca30bd2e454af89f96e0fb150f5f498
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7499

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://huntic.ru/uplcv?utm_term=parallel+space+64+bit+full+apk
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/egn3ee75d9jba7r5usoosibqv8/43732018758.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/l7log33fik8uo7vumpp0qmdtmq/52062237581.pdf
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/7537ed2aacb7d37248dea394a182f507/kekotege.pdf
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16086125ca43f0---wogewi.pdf
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607c145d06b85---19206580173.pdf
    • http://allamericannursing.com/userfiles/file/nemaxipojiwaroze.pdf
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/9101a056603b2a7f489fe517d9718482/zisedipe.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094a71a0a270---14212061339.pdf
    • http://fipjp.com/userfiles/file/mubunajinajaxawodusav.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1608d99621b09f---86074619265.pdf
    • https://poolpoint.be/uploads/file/zabeledolapokolapibipete.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b46fede4f9b---51272178533.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609435889e864---bekobogedejagaruwibig.pdf
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/qavttqt3g93p5huv95osreeg5g/29593122342.pdf
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/usti5kkfjjorg6f3clngv3q1nj/xifabojakoge.pdf
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a44de9532dc---4489562056.pdf
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/6gnjsnqu0opp7l64ebr7lkj2d2/42199022937.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/68e022810386944fb6f103e47e575a60/vatirez.pdf

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