Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f254708d66795e9…

MALICIOUS

PDF

91.4 KB Created: 2021-07-07 11:36:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 714d2f5de15918ca81af9ee663b5da3f SHA-1: b03e324be3f14d728f41fb0de0d7f6cfa2804079 SHA-256: 8f254708d66795e9672355869cdd1b4d1919e0bd42bb55b2f527e16bde49b07b
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. The heuristics reveal it functions as a link farm, with many URLs pointing to compromised WordPress sites, likely to host malicious content or redirect to phishing pages. The document body is heavily obfuscated, preventing analysis of its specific content, but the overall structure and URL targets strongly suggest a malicious intent to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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
  • 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://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/lt8641b1q0dgimdtg89jtn5vqr/laxitomogovi.pdf In PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/9d1386054d4257b194a8dc667673a299/kagodonisidutibuzigavesuj.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/57f6cd228062e9328c1cb0be2d2b9564/bikupizalemegemuxula.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/vnm6n9gd1612qsle8qj3ib5il5/5915892266.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/likurepokuxenajatu.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aad77726d95---mekapodovikogasibuki.pdfIn PDF document text
    • http://gallery4walls.com/upload/editer/file/66765968842.pdfIn PDF document text
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/5fe4931d63cb964225d59bc3be51795c/28914712817.pdfIn PDF document text
    • https://ikuseikyokai.jp/ckmedia//files/giwogelapub.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/cbecd0cf8cc46bde0c1ea75f41b8100b/54729483122.pdfIn PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/86935630546.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cd8eb58f4d4---18379756843.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d1355d1b6---puzilemefiduwagokom.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba6cd71a95c---moriwatatetosaganowibufov.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/70494158919.pdfIn PDF document text
    • http://siembra.me/uploads/files/folesewufamukizub.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8d3e0dace---72867917786.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/1c212060ce43a59f2b4b1783c2deeca0/rixetetavewalinibile.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/nuwel.pdfIn PDF document text
    • http://hhs63.org/clients/8/88/88ec95b665b56da82b1de85f097fba10/File/45085289283.pdfIn PDF document text
    • http://khamtribacninh.com/images/files/2875368673.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6003d84f6---mavewotilewiwogixubat.pdfIn PDF document text
    • http://brightwayconsultancyservices.com/userfiles/file/15464449429.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=evolution+of+worship+music+a+cappella+medleyPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e88c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88C 18148 bytes
SHA-256: a9c2530c702b50a7df1f5e7355c9880cf1a086060e33821a5146c6a4b12ba06a
font_01_sfnt_off000117cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117CC 11236 bytes
SHA-256: 30daa53531050af50165be1a533b2ff73c0027410792049205ef092f0ae19aac
font_02_sfnt_off00013201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13201 16144 bytes
SHA-256: fcca37035df06e555c2991ff65faa0e8497ca6423bee408ebc46b3aef925b516
font_03_sfnt_off00014780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14780 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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