Malicious PDF — malware analysis report

Static analysis result for SHA-256 54c5db288f930a58…

MALICIOUS

PDF

89.7 KB Created: 2021-06-30 21:32:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 432a3c7b7244204a625260b94c867a48 SHA-1: 256e446aa38d6c5dfecf708b76ba49bc3ad7beb5 SHA-256: 54c5db288f930a58d12c792e739e590b718c61361b3cfe6e8e2d282b013d9f2b
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a common PDF-based redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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 http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b163b09b860---pijavezigalomos.pdf In PDF document text
    • http://mirai-kankyo.com/userfiles/files/nubuxivukuvuzuki.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/5dos5gmeps3dril8ut4olarcpk/kowadub.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/681669150fb49a098f9c4df5b58c80ff/44093912643.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/02b935ffdfbdc56057e518e5f61bf72c/9124050625.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16079ce00c87c0---46197230399.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/5cba3fithc28mtv0ij5f19r6rg/89312335997.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c38607e711d---mufotuzegevagi.pdfIn PDF document text
    • http://4seasonstours.in/userfiles/file/larolosepeputuv.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160909168320f0---bamonusijulo.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/21effff638d13d47902198c2ba1d32de/pepifipejosifebuxesuk.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/48634109190.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf5c302151---20621191054.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/pn33ck41poarsv8pmpnmt2ov8d/89331870273.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16092c7067f1f6---71119728669.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/gatisiribalus.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609b392f17d0b---nusefirewegidikupe.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a07b242e57f---17548421239.pdfIn PDF document text
    • http://bluekeydigital.com/images/pic/file/fefuvud.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/uvr55n513sb1uhs8aa8b3j5pa6/buwoz.pdfIn PDF document text
    • http://kimhoatra.com/upload/fckimagesfile/xepapijefamef.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d3d55048b---jepalelamot.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/62935248667.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/e35566341bd5a4de168fc07913a35387/sakav.pdfIn PDF document text
    • https://festival.bg/fckeditorfiles/file/53655429684.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ikhtmd1oir7qldlo4f6nu63a66/vukewotatatesixexaluxuvat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=find+the+area+of+the+surface+generated+by+revolving+the+curvePDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/b96b8cb6313ac73debfbdaae17efda57/zobasunarusomabetir.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_off0000f956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF956 17216 bytes
SHA-256: dd0e15529b067e05d5b1dec165cad985dcb6b06316ba0e7d5723ec8daab3574f
font_01_sfnt_off000126c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C0 11152 bytes
SHA-256: 1ab0380f8b3793d8dbbc05e639ea01aee761a74a81070781f16ab3b01b295372
font_02_sfnt_off00014090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14090 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1