Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bf7029e1bea70c4…

MALICIOUS

PDF

76.2 KB Created: 2021-07-23 03:19:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7bb5ec2a9c18b696f4580be861407a66 SHA-1: 90c5f28d9194c6e8c29ea19b19328f7ae5b61390 SHA-256: 1bf7029e1bea70c465aade3f93e486140fbf4b97d6d761634c5d893ae6605ec7
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 identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs, while some are marked benign, are part of a larger pattern of directing users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9177

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://m2m2design.com/userfiles/13638357104.pdf In PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/e6mpjh14njj1p57h7667s96n97/95590067515.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1606f6b180419f---waxuferuma.pdfIn PDF document text
    • http://mlsy.cz/images/file/files/50396880259.pdfIn PDF document text
    • https://selispin.com/calisma2/files/uploads/2506318284.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/13d6fe3459eb12a96e32e3e8af2123f7/43470954640.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/e6195886580312d4ee375be596768bc4/kegupifur.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4dc9c47b09---99636768412.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/xotiwisivovomixabot.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5d972b95d---fisufuzuxinifaru.pdfIn PDF document text
    • http://sintellect.ru/Repository/file/63556328864.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/wewogibijizeboti.pdfIn PDF document text
    • http://ysenb.kr/board/file/editor/file/57227888482.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/99100146378.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/0gb8tlbskkgdr1rs02va9urr2r/24301219988.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/v2v840ndheklb3d8ppmf9brds3/3250659760.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/fazoxogitetekozurara.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/696c3277295ecab93dcb388f04fced66/pekelawuvax.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/a15cafaec767cee2402ee325124d3610/piluzagazura.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ad909ef16ac---rumibuvipasamavomoto.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/dimikib.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/57684850760.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/057048d3eae5d1ab1a5ed1a8d45ca440/sorusijazim.pdfIn PDF document text
    • http://randoquad72.fr/userfiles/file/7637226948.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/4t27klf295l0dlpstj29b007kk/19105278803.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=the+mighty+ant+class+3rd+question+answerPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD406 16744 bytes
SHA-256: c752ba30add3294d27e7f2528c2ea0d44052c75228fcc7de9ad800d1d2844879
font_01_sfnt_off0000ffc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC4 11400 bytes
SHA-256: c7d6b4ddec18c2928eb758a07e34eee661f1849283e9d5122d05f9d615e40a8f
font_02_sfnt_off00011a14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1