Malicious PDF — malware analysis report

Static analysis result for SHA-256 df0ce098cd698a30…

MALICIOUS

PDF

93.5 KB Created: 2021-07-31 08:30:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: c0b72d3bd32adba38ad2f3f1fea4c1b1 SHA-1: c0c421cf07e6e7eac1ba832cdd20cb79415607f2 SHA-256: df0ce098cd698a3006cd68dd29641b345b61ecd75c6ccfd1a44cb6365252c81f
164 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and a machine learning model assigned a high probability of maliciousness. The heuristics indicate the PDF contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting it's designed to host and distribute malicious files. The presence of a visual download button further supports a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://brianhaymore.com/images/e/file/jedapikuninomelofule.pdf In PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac2460f04b---30561467054.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/qv0a08iu2nrq0sps2k26d44p1l/bodegizizezojib.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a2a2a0ec6---wovivutewana.pdfIn PDF document text
    • http://holmeslawfirm-iowa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dutizalivalobokozuw.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/6097dcb5b33d0085d4adfc56ea44ae1e/19230582493.pdfIn PDF document text
    • http://clarkhigh72.com/clients/3/34/34275c7d49a174b5f6cf03bf5966da6c/File/49251052951.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/28009865322.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/89373855559.pdfIn PDF document text
    • https://aglogistics-bo.net/userfiles/file/suwepoxa.pdfIn PDF document text
    • https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/zigekidopefitegopegowusi.pdfIn PDF document text
    • http://costruzionibulagna.it/userfiles/files/jimivutefupimoloragapazet.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/8f4ad4c42a39eb1ac2bf2ebf2194cd75/95110675575.pdfIn PDF document text
    • https://lotte-ppta.com/beta/assets/file/ronomotafamerad.pdfIn PDF document text
    • http://greenplanetnepal.com/userfiles/file/fojog.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/ac50e9b73bc276410bb4445689954d5d/xisibif.pdfIn PDF document text
    • http://studiodabo.eu/userfiles/files/55659196362.pdfIn PDF document text
    • http://daiichihr.com/uploads/news_file/tiwudozolog.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/8c15a099819b76c68c9faf56ef525a49/51518916895.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9855149661---juximeliwugula.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/iej9mk7kcmctj9g2q5gdcfbo4l/segozevodixagevejezuwi.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16088f6c7163af---kimogise.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a14a720e80b---13944275236.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/28713721121.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=roblox+mod+apk+robux+infinito+2020+download+atualizado+mediaf%C4%B1rePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off00010153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10153 19332 bytes
SHA-256: f60fc049ee46d910014eb457c4fe6351d986c956b00389be6bdd733a8ec34efd
font_01_sfnt_off00013149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13149 11404 bytes
SHA-256: bcf53370503b4c207a3c11a746c9daf1f6aa219bd5d67a4c0d0f5fd8d45f4ee7
font_02_sfnt_off00014c01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C01 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1