Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac9588e74ae7ec0d…

MALICIOUS

PDF

119.0 KB Created: 2021-06-29 21:54:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 9c1ee4d10570bc87b5022a3c744b6fee SHA-1: dc578aa3da57b55a3b66eea10574560fd670817d SHA-256: ac9588e74ae7ec0d2b271a102ff7edac5e107228057f64f5d00406547694842b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS upload storage, indicating a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/vi1l15s98alvas4ffjtlgo3212/mekovirozovi.pdf In PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/fp46jc6kv1ek58nfptmsr840qu/11202021079.pdfIn PDF document text
    • http://3sdent.com/upload/files/21274847998.pdfIn PDF document text
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/nokekikub.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/85187438163.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca56f82e4b1---kavajutetaforogoke.pdfIn PDF document text
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d171bd8af1---fumozopineramejinabam.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/wetefebulopadexikuvax.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/kv4iteffdij309c34i2dglkabg/dopixolezulovok.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/4af37a69c29faf1b4de691652a5c0fda/vugalalowezu.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/rfmvr0chjbs7bit53iia6sil56/dafuvizuv.pdfIn PDF document text
    • http://sunnysolutions.it/uploads/assets/file/disaxoreku.pdfIn PDF document text
    • http://nandeestationery.com/userfiles/files/50842345446.pdfIn PDF document text
    • https://lawrenceyezersky.com/userfiles/file/pilagalulujabaj.pdfIn PDF document text
    • https://f27szerviz.hu/upload/files/lasisobigavatasi.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/qdqgqqqfpngdje1visfoanbelj/doladubomejizixuxirasiniz.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b2aaf15cb---mapalewujuwuzobuzibofe.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d20772eaffe---98627634707.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085b3fff2ae7---5916165714.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/9fa356381b42c11f3e720031350aac91/toruwetexugovijituruvile.pdfIn PDF document text
    • http://sgd42.ru/userfiles/file/rerimozalijuxonajakerak.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/b35148d8b8fdf0099ac249beb927f8bd/jojarigukitofalevunux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=juvenile+yellowtail+snapperPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17073 10600 bytes
SHA-256: e971abad8723689090bf24fe2f748b63bc9146e832172f46c24c4fd05524fa72
font_01_sfnt_off000188ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x188EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001a0fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0FE 17424 bytes
SHA-256: 32de815285008b633b2b6ed7db604c0f6bd198e8712b1d5c0792182ce536e645

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