Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdf4ce445f6c295d…

MALICIOUS

PDF

62.5 KB Created: 2021-08-25 15:16:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 16dcbcb99e5fca984b191f4a31256cc8 SHA-1: 0461a137a5bcea83217aaa37c0b9f1d88ea1539c SHA-256: bdf4ce445f6c295dede7f0af926cd32ebad522b6c7d5f231f033446a83459c9e
154 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple compromised CMS upload locations, indicating an attempt to host malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The document body is heavily obfuscated and unreadable, providing no direct user-facing content, but the heuristics and URLs confirm the malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9862

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://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f681807ee---dakelelipuworazawewipinek.pdf In PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/b2385a014cd9aae3c9310e766a41f548/furumele.pdfIn PDF document text
    • https://taechoclub.com/FileData/ckfinder/files/20210703_F5164AE8996DD34E.pdfIn PDF document text
    • http://tramtronbetong.com/uploads/userfiles/file/12745653691.pdfIn PDF document text
    • http://ugrctrani.it/userfiles/files/mawobavezapimepogagoz.pdfIn PDF document text
    • https://indikino.com/ckfinder/userfiles/files/39031272706.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/vinadixukakixuvozipikimo.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/rededutuzosesitidawusuwek.pdfIn PDF document text
    • http://architettoletiziamasciotta.eu/userfiles/files/zaxojeterevapexefi.pdfIn PDF document text
    • http://eyupsifalibitkiler.com/resimler/files/3223226276.pdfIn PDF document text
    • http://ergo-logo-bamberg.de/userfiles/file/sevawopofixu.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/39788227086.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16109ad7a3426d---15045415395.pdfIn PDF document text
    • http://kavtas.com/images_upload/files/81710653862.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/99757966127.pdfIn PDF document text
    • https://feldmann.pl/userfiles/file/57070323386.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160849b70db83f---fuwosejimumafopum.pdfIn PDF document text
    • http://shukokai-voves.fr/userfiles/file/30910499407.pdfIn PDF document text
    • http://veterina-naslunci.cz/userfiles/file/45078890822.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16075e99a3e9a8---89569647130.pdfIn PDF document text
    • http://ridgefieldpark1967.com/clients/3/39/39eebdc8797e30ee23d4fd57d071fd44/File/jopuleziputibafibenatobu.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/cfb3119e986376e28In PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=best+weekend+getaways+for+couples+near+mePDF link annotation

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