Malicious PDF — malware analysis report

Static analysis result for SHA-256 db02a7cf02210b6c…

MALICIOUS

PDF

39.6 KB Created: 2021-09-30 12:12:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 6476c34b07821b438ab00c3517255df5 SHA-1: e875b8e3008ebc767f0fc3247bb349cf4e006f69 SHA-256: db02a7cf02210b6c82d66ae9150736d17fc004487a3fbfadf370500a59eeb9e0
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing lure, employing an image-only design with clickable links to external sites. The embedded JavaScript stream and numerous external URIs suggest an attempt to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9449

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 39 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=how+to+download+monument+valley+2+for+free PDF link annotation
    • https://htchninc.com/d/files/12666757388.pdfIn PDF document text
    • http://studioego.cz/userfiles/file/batarebukedanitamatidako.pdfIn PDF document text
    • http://pajurioverslas.lt/ckfinder/userfiles/files/47560078853.pdfIn PDF document text
    • https://libyamonitor.com/sites/all/libraries/ckfinder/userfiles/files/68562384110.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6a1285e33---pojovavudekuwedunegolib.pdfIn PDF document text
    • http://hanasushipickup.com/uploads/files/nigeganuka.pdfIn PDF document text
    • https://gabconstruction.com/ckfinder/userfiles/files/lipoxaje.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/fcf3880326f713d9b2e55a46af5fb847/xazamebepinetisif.pdfIn PDF document text
    • https://www.vek-bg.com/app/templates/js/ckfinder/userfiles/files/81549963333.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614138bed1f85---zodoba.pdfIn PDF document text
    • http://ms-beauty.com/ckfinder/userfiles/files/77104169134.pdfIn PDF document text
    • http://artin-intranet.com/ckupload/files/90868511821.pdfIn PDF document text
    • https://dormet.eu/web/uploads/files/25698137571.pdfIn PDF document text
    • http://videlec.be/ressource/file/gutijonofomitipukobiduw.pdfIn PDF document text
    • http://onlytech-tunisie.com/userfiles/file/60320562196.pdfIn PDF document text
    • https://timminsrenovations.ca/file/iL33CMYbcLIUXt4a.pdfIn PDF document text
    • http://nessium.net/userfiles/file/topasonazigotoput.pdfIn PDF document text
    • http://freewest.at/fajoj.pdfIn PDF document text
    • http://smflow.in/admin/uploads/file/rimozo.pdfIn PDF document text
    • http://www.teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/fulasobefuwose.pdfIn PDF document text

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