Malicious PDF — malware analysis report

Static analysis result for SHA-256 22ff63b0e72e548f…

MALICIOUS

PDF

116.5 KB Created: 2021-06-27 15:24:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 62691a96da2a122b4ec26fc53c42cd9a SHA-1: 4dc67963eb6860cc39b25018a4f689324980f1ce SHA-256: 22ff63b0e72e548fb3be4ae0b5ef5ebec62482ef884f1dddd78c42836a75b9cf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded URLs, many of which point to compromised WordPress sites. These URLs are likely intended to redirect the user to malicious content or phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

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://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/9932a06ed8b8c9a34bbd2a4ba2019e32/jomubirovogovi.pdf In PDF document text
    • http://autohondl.cz/userfiles/file/fevivijawavidigodifep.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160744bdead88e---bilejusonivasoxexowuw.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608dcb9109869---pasavuloroj.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b4de8c83bcb---97410246665.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/55e3593bc3b06cfa8186b26486edfa52/lolagikogapesadidosat.pdfIn PDF document text
    • https://miguktour.com/FileData/ckfinder/files/20210611_B499B56A59909A34.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/55091189037.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/wujepekimasakobe.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607633bf283c6---jetizuzowoge.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a29fd3ddb7e---150275073.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/7fc0646fcbc8ff06f6e653ab9c62b195/39583955899.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608e60907d370---woxejuvofibisisat.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c3023965736---37371551162.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a59d7a76fce---pirat.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/2e162fc5b39d8e07ba9ce40feb0c05f4/6389994840.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607673cfd5bb4---gixubexemixosetufur.pdfIn PDF document text
    • http://3wsystems.com/shipinc/userfiles/files/zizitazisowumipinuxidar.pdfIn PDF document text
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/a63c4ee099da6058ee2dadb7dd14e0fb/14218475293.pdfIn PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/kepowujiwafuz.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/fobnpajgea2nhkh37rn84hjtb5/situbakadofaderej.pdfIn PDF document text
    • https://luminex.pl/upload/file/lojigafakifu.pdfIn PDF document text
    • https://dm288.com/slicice/file/tizowofitam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=poe+can+i+change+ascendancy+classPDF 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_off00014ebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EBD 5472 bytes
SHA-256: c9c8602056da7ad9cebacb9a18dd258b809cb7e9e23b39c3cedc59ec31605848
font_01_sfnt_off00016217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16217 19920 bytes
SHA-256: bdee107ff1a4f30e0e08587a5277768fa8967b81045604bd5fc97f797c8859e2
font_02_sfnt_off00019480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19480 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001ac97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC97 10564 bytes
SHA-256: 357f03ac3a15d805cf2db91086506d79063ba9fc26287e79fbeb2f5dcb9c4b7a

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