Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bf82bf942f4fd16…

MALICIOUS

PDF

86.0 KB Created: 2021-06-26 14:30:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 3b9a718f1b2b48d78f1e6aaf91ed0a7f SHA-1: ea09d7049b8651ba55ab576881423de8c0b6dbee SHA-256: 9bf82bf942f4fd16d570478684191a0a7450a523cc5c587b7fc5bc6f71175352
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and disposable hosting. These links likely serve as lures for phishing or to distribute further malware. No scripts were extracted, but the PDF structure and URL patterns are strongly indicative of a malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://archism.ru/uplcv?utm_term=how+to+put+water+in+a+bucket+minecraft PDF link annotation
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/vba4pidql8vv0iirb7ugque57c/55870197418.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/gigenoxafudaxoxenefiwaro.pdfIn PDF document text
    • http://vigova.vn/Images_upload/files/lirade.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af8ca78e4d1---lawerovolawegezibuv.pdfIn PDF document text
    • https://nnt52.ru/userfiles/file/xodomawomitinebus.pdfIn PDF document text
    • https://dalton-english.com/userfiles/file/71134168077.pdfIn PDF document text
    • http://uptownchantilly.com/uploads/files/ravigaliruxaxome.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160adb3efa294e---zesiwaz.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606d610717dec---sufosa.pdfIn PDF document text
    • http://kelvista.lt/images/files/ponirijujopavokosalo.pdfIn PDF document text
    • http://ukrainski-rosyjski.pl/userfiles/file/juganedoguxu.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/06327b4de2287a88de20a30c6be8fbe8/jiletedexilopapolunepi.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/f3a2d87cf56dbecd4cbc7c6c16b0ad0a/67788697235.pdfIn PDF document text
    • http://karunb.com/UpLoads/files/78285928817.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/68edqe985dv4j8rumoir84jrf6/xukegitojinedet.pdfIn PDF document text
    • http://enotecagaribaldi.it/userfiles/files/wajuwusapakot.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/255451010601ada7680603bccb4066c1/vubowelukaximeja.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/10838360699.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/85e61ca831dbcc9e62497cb84183b5e4/41281381952.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160a8628745092---bijulopadurokisoti.pdfIn PDF document text
    • https://okvino.it/file/95466253671.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_off0000e963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE963 18228 bytes
SHA-256: efc408076e96f3a38dbe7a5b6f0bdc5a1c569824bce5ddd3c1fd2aa8061c71a4
font_01_sfnt_off000119c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000131dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131DD 10836 bytes
SHA-256: 3092c198709db680e666b4d6e57df08d1d56812e089fe5b2a7e81f3dce03603b

Open this report in the interactive analyzer, or submit your own file for analysis.