Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b9bfe1886506504…

MALICIOUS

PDF

91.5 KB Created: 2021-07-03 13:41:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 9db9adc1b044f15d566ddb9fa3437926 SHA-1: f1d7efdbd4f5a980794f18358880c4578638add2 SHA-256: 9b9bfe1886506504aa473c50d88342ccb9928b4283d7ee486d633d801bd57142
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised websites or disposable domains, indicating a link farm designed to lure users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL analysis are sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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 http://msnladyboy.com/ckfinder/userfiles/files/87830966473.pdf In PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/494ef1a53fc219e98bfdd05ae6d99db3/28319834169.pdfIn PDF document text
    • http://marymo.ru/uploads/files/neletazutovofufuwi.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160853f7742ee1---zesexuvikozifiludi.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/f8d21817ea97ab07e26efef4c9a2f8ce/wareja.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/2911c52eb9ab7bc58bf7a69bf216b940/xusuziremevexonivupibila.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/p9bavsebic79jcfanu937lfq26/60452211743.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/mavewevate.pdfIn PDF document text
    • https://info-jimukyoku.jp/lot/upload/files/kejowef.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/suselujo.pdfIn PDF document text
    • https://porterbrothersltd.com/app/webroot/uploads/92547944772.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b547b9d2c8a---midusagatulejijes.pdfIn PDF document text
    • https://promobryansk.ru/userfiles/files/56181248562.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf1280f0f4d---77258600710.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/089d8d43143a3e421b2d8ba7f02b06c6/nuxarepifidetovijijex.pdfIn PDF document text
    • https://andrejc.si/files/file/batekoge.pdfIn PDF document text
    • http://fitviewer.biz/files/file/genakepotavid.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/84800781936.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608db94cd1e51---lixesikowovebebat.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/eee6b91da0624ade1973bfbe7048707d/lojak.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160befbed446c1---27810652144.pdfIn PDF document text
    • http://beulahcooleycollection.com/clients/870349/File/78651429072.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=he+is+big+and+strongPDF 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_off0000ec61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC61 17636 bytes
SHA-256: 89c98503d0da39117b5cb40fb6be41fd350bd9b615cdcf1cc25c4e20df86eaef
font_01_sfnt_off00011a35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A35 16376 bytes
SHA-256: c0ce40a0db5da46198e8a330e54b405f016c0121b1c9e2ed55fd47191f7d331c
font_02_sfnt_off00013078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13078 10508 bytes
SHA-256: 92b95969a6d0db967e21aa357dc5c2fed69a068db310caf15f6de88c21ce3e8b
font_03_sfnt_off0001484e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1484E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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