Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcf9860fb55039b6…

MALICIOUS

PDF

105.2 KB Created: 2021-07-02 14:36:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: e5bc32a44fd12fe5dbba8d0764275505 SHA-1: 32e1655354ebbda2acc7745ba24f6a0bf9543522 SHA-256: bcf9860fb55039b61abd8a31d719991f4971151e46b873bf50192ef57cd46cdc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous external URIs pointing to compromised WordPress uploads and other disposable hosting sites. These links are likely designed to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

Heuristics 6

  • 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
  • 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 https://inwebjor.ru/uplcv?utm_term=xtremepro+4k+ultra+hd+review PDF link annotation
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/9d0ba6e77b317f72bc6390273a2428b8/53694873354.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/gigagegafabisuxevux.pdfIn PDF document text
    • https://ht-cooling-j3t.com/contents//files/53118198931.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/9653e7b89cb6510911cfcc8c3218020a/polegazebupote.pdfIn PDF document text
    • http://www.armstrongre.com/files/files/gujexodojatuge.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/zukobeg.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/cihrq9f7j0bn5035lbp9k88442/vuxinisonofi.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/k9f4dbtffhsmht2drgu0e3gdbc/kemoxuxoluxetexu.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/kqci5ft1ndd8nu9vchoeki6kp3/1867825897.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/126a6aedcfeea8a0c0dd221c974aba7d/vupaduvunolujamopuxu.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/83899255485.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/83124c3d1f8a60fcd09548853d8894e6/48299174347.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc8ceab0527---xafinokunabedagoxobev.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/94eec52dd53c35fa19598fb52c4e8a7d/87579987279.pdfIn PDF document text
    • http://sahamit.net/userfiles/file/nusodaraxujurexab.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/706h43ihjc929lo8l70mi8or5u/povivu.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/fa7cdc74c0e9ee97c4fefb52573d0f91/15505429577.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/73863219760.pdfIn PDF document text
    • http://konemara.hu/userfiles/file/bogumekapi.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/kegulibidumosip.pdfIn PDF document text
    • http://kbo.pl/ckfinder/userfiles/files/98124642092.pdfIn PDF document text
    • https://living-stone.lu/userfiles/files/53542631138.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/2q77akcu8s9fj4abesfb6o89g6/17700923196.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8ca8807d8---disagowiwukogog.pdfIn PDF document text
    • 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_off000137a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137A9 17924 bytes
SHA-256: a9cab27dc66fc7245fb3618c560d2864cacbcc14ca735d9830e8abfc58bfbe98
font_01_sfnt_off000166af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017ec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17EC6 10812 bytes
SHA-256: 4d49b2d61cbacd446bc8f7e2334e037ade5a0e57312c4a46b4a529422978953c