Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4fbe5554d5c1208…

MALICIOUS

PDF

77.1 KB Created: 2021-09-11 00:05:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-02
MD5: 088cb935139495e77069d352f9d8748e SHA-1: 0a3fd87800df0edb7247806d80bdc147a6523336 SHA-256: a4fbe5554d5c12081ecd5167c722bd8d08e54bd671692b155b099503a6986601
214 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://wastran.ru/uplcv?utm_term=looking+for+alaska+book+download In PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc7e31e4e3---97433477726.pdfIn PDF document text
    • http://sksound.com/userfiles/file/wodulejerisudaga.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/70958593530.pdfIn PDF document text
    • http://pololanna.com/user_img/files/junijomosotokebazekole.pdfIn PDF document text
    • http://ersenergy.com/UserFiles/file/8409226728.pdfIn PDF document text
    • http://geriatriccarenewjersey.com/userfiles/files/35268594544.pdfIn PDF document text
    • http://indianmailbox.com/assets/images/userfiles/files/81620476146.pdfIn PDF document text
    • https://beautifulhairstore.com/upload/files/nopamivi.pdfIn PDF document text
    • https://stauber.lt/images/files/sutexiwuk.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/57547885160.pdfIn PDF document text
    • https://stpeterscbs.ca/ckfinder/userfiles/files/9806037586.pdfIn PDF document text
    • https://almudenafernandez.co/ckfinder/userfiles/Files/suvez.pdfIn PDF document text
    • http://rmgoals.com/userfiles/files/sirorenofopupifalikota.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/d78c3e4cac98fd57ed906b4bb7df5681/vufiwat.pdfIn PDF document text
    • https://anbuadidravidarmatrimony.com/ckfinder/userfiles/files/nesikagerapugigawurew.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16133a9b74a082---worolomi.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161337a9787c26---2699087049.pdfIn PDF document text
    • http://ebonit.light.bg/includes/libs/ckfinder/userfiles/files/gonowijuxosomezuzis.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133c06e9dd8b---6262089526.pdfIn PDF document text
    • http://cudicio.it/images/file/62217602062.pdfIn PDF document text
    • http://johnmarzillier.com/ckfinder/userfiles/files/lomaz.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/nolobifofunivimebunoti.pdfIn PDF document text
    • http://medica-brno.com/files/jovitem.pdfIn PDF document text
    • http://1day2night.com/UserFiles/file/77224469394.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/95052649626.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 extracted file (font_00_sfnt_off0000c406.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000c406.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC406 19416 bytes
SHA-256: 319c68fc40946c8f762009c775dad27a66a40a017f43062d204daf6d10117b39
font_01_sfnt_off0000f6f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0B 10576 bytes
SHA-256: f8fb0c1e4cf6ed9558c341ab78808eefb322bf76aeaeb9ce5ed97b8670f076dd