Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ca3004fdc590f0d…

MALICIOUS

PDF

45.7 KB Created: 2021-09-20 13:06:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 085c7e36ed2c6e7538a2870fbe6d0a75 SHA-1: 7b48c08049356c5f68e9d496eba837d2e8e62e0b SHA-256: 2ca3004fdc590f0d5f977531d3bd5e109a31d2e0112d0fb1fd28aadf6255b798
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains multiple links to external websites, some of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users. The heuristic 'SE_LOLBIN_RUN_COMMAND' indicates the presence of command-line related tokens within the document text, potentially for exploitation. ClamAV detection as 'Pdf.Phishing.Trojan' further confirms its malicious nature, likely involving phishing or the download of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7407

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://irlanc.ru/uplcv?utm_term=crack+pdf+password+using+cmd PDF link annotation
    • http://terralis.eu/catalogue_dynamique/file/nupafilidodesoxibow.pdfIn PDF document text
    • https://institut-arabe.org/ckfinder/userfiles/files/gidipopetorawidanul.pdfIn macro / runtime command snippet
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133c9bca36ba---18966972115.pdfIn PDF document text
    • https://bc2000.order-pro.com/ckfinder/userfiles/files/60003878768.pdfIn PDF document text
    • http://dolekkoyum.com/admin/UserFiles/file/makigilujuvo.pdfIn PDF document text
    • https://membermimpi.com/contents/files/25260299905.pdfIn PDF document text
    • https://indoshaolinkungfusociety.com/ckfinder/userfiles/files/82832793383.pdfIn PDF document text
    • http://locthanhwindow.com/img_duhoc/files/59876428350.pdfIn PDF document text
    • https://peoplehelppeople.net/uploads/File/3791840545.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/6ju4sfkn6tgllpuhdgrgoeead1/1953514292.pdfIn PDF document text
    • https://cissud.com/uploads/ck_editor/files/fedesufadiwelafus.pdfIn PDF document text
    • https://hyundainhapkhau.vn/upload/files/zafilipavikulej.pdfIn PDF document text
    • https://detectagsafety.com/ckfinder/userfiles/files/86350670887.pdfIn PDF document text
    • https://nirkongrp.com/ckfinder/userfiles/files/79886484602.pdfIn PDF document text
    • https://zohopin.com/calisma2/files/uploads/palar.pdfIn PDF document text
    • https://traiteur-troyes-mariage-buffet-aube-10.blaisot-traiteur.fr/ckfinder/userfiles/files/pisipir.pdfIn PDF document text
    • http://kondicionery-elektrostal.ru/upload_picture/file/bopuforuxosuvilezusaxiba.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/20913949149.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1b068b65ec5787a682ccfc6cfa69d613/77320670380.pdfIn PDF document text
    • http://clinicaveterinariaalbese.eu/userfiles/files/xoboz.pdfIn PDF document text
    • https://www.sibirprokat.ru/ckfinder/userfiles/files/82174441017.pdfIn PDF document text
    • http://taispacedesign.com/upload/files/kuxila.pdfIn PDF document text
    • https://castilloexterior.org/ckfinder/userfiles/files/95955695962.pdfIn PDF document text
    • http://terralis.eu/catalogue_dynamique/file/nupafilidodeIn macro / runtime command snippet

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