Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4d617fe1c24838a…

MALICIOUS

PDF

63.7 KB Created: 2021-09-01 03:18:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9ba88588724f79ac7e0c2cd8877de0af SHA-1: d681ebdb6a4067366f438b9bb853c4faf33a3ebc SHA-256: d4d617fe1c24838a17d1ad69256384820198e6fe76310bcc7c90ec3792b13423
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable hosting domains. These links likely lead to phishing pages or further malware downloads, consistent with a malicious document designed to lure users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9033

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://pistant.ru/uplcv?utm_term=promotional+plan+example PDF link annotation
    • http://kmbb.at/userfiles/file/ramogulilekobake.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/6cb76ef5a82762b4b6250e2b6ab80d0e/menamerufebef.pdfIn PDF document text
    • https://kermanrooz.com/img/files/pefafukijuzexe.pdfIn PDF document text
    • http://neoneofitou.com/ckfinder/userfiles/files/bizevafig.pdfIn PDF document text
    • http://mecateengenharia.com.br/ckfinder/userfiles/files/29896660093.pdfIn PDF document text
    • https://kuraniterbiye.com/resimler/files/60077305796.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/emrs0fbullin422oqv8nk1bren/40212822725.pdfIn PDF document text
    • https://nasselgrundet.se/anvandarbilder/156/files/31810418810.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/javemotaga.pdfIn PDF document text
    • https://travelworld.ro/userfiles/file/24321207270.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/794u2s75rkgi1hhrmq2fnf4m20/nizalefubawaviwesipa.pdfIn PDF document text
    • http://dh-life.com/ckfinder/userfiles/files/vejusewasig.pdfIn PDF document text
    • https://alajuusa.eemedia/contents/file/40687674107.pdfIn PDF document text
    • https://efnnma.org/files/file/foxizokux.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fbb97738d5---zoxonex.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/e898c8d293b8ef7a4d1be3a6ee84127f/70077725028.pdfIn PDF document text
    • http://dreamwith.gni.kr/ckupload/files/tefekubi.pdfIn PDF document text
    • http://www.web-globus.de/ckfinder/userfiles/files/53589576939.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/85172559455.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/e26127ab06edd46994bfb7f85da4bd82/17385275818.pdfIn PDF document text
    • https://delphin-bau.com/ckfinder/upload/files/zigajanakovabaponabigesad.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6bd49111c7---kalaxewafazaxaduz.pdfIn PDF document text
    • https://ajansnigde.com/resimler/files/reropanifunoregukon.pdfIn PDF document text
    • http://outspokenholland.com/userfiles/fckFile/20210606120136.pdfIn PDF document text
    • http://sriagasthiyarastro.com/FCKeditor/userfiles/file/45553631356.pdfIn PDF document text

Related samples 8

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