Malicious PDF — malware analysis report

Static analysis result for SHA-256 d45a076d412f775a…

MALICIOUS

PDF

55.4 KB Created: 2021-08-25 09:57:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d26605d09b0ada002388fb014e6fb508 SHA-1: b74fa66eb444405e5f7e961a67d3084b9a3ba4ec SHA-256: d45a076d412f775ae2d4c689133f0e55f6baf9c99e0568ef3a43ab18e6549d1f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external resources, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. The presence of PDF_RANDOM_URL_LINK and PDF_SEO_DISPOSABLE_LINK_FARM heuristics indicates a pattern of using algorithmically generated URLs and link farms to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7449

Heuristics 6

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 http://azizolace.cz/images/file/74401254549.pdf In PDF document text
    • http://alarcon-v.com/editor_upload_image/file/64878793299.pdfIn PDF document text
    • https://hagabb.ro/ckfinder/userfiles/files/tixuvijadonesizulizejur.pdfIn PDF document text
    • http://campfirewtx.org/userfiles/file/lunalafugi.pdfIn PDF document text
    • https://istanajp2.com/contents//files/28496981228.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/3885288d47b2b4252b53b3f76c327fe8/xegepisazoperijimegadoz.pdfIn PDF document text
    • http://foodchemsino.com/d/files/fumejirodawibogopo.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/00dea9616ed1bff4325417f4e1f43d94/fibabinigafi.pdfIn PDF document text
    • http://rallyteamwalraven.nl/file/54836848977.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/fowokujibawe.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbf33bb5ef---72343259648.pdfIn PDF document text
    • http://ashokarefrigeration.com/userfiles/file/47076411433.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/2n6aeanr230khaeosuouv11276/8297793545.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1610c4e34b0679---duvexes.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f1a9eead232---11604909065.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/7cc5f81c313e52e09f6519bfdd81b6ea/takoju.pdfIn PDF document text
    • http://forti.in/userfiles/file/wibaramobovuriba.pdfIn PDF document text
    • https://arte-salon.ru/upload_picture/zatidovonivakewejewilisuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=android+gamer+apkPDF link annotation

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