Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af06cc6b88f8f5a…

MALICIOUS

PDF

87.6 KB Created: 2021-08-16 07:56:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-06
MD5: 11f884109fdb73adfd3efc9c59ffb4ab SHA-1: 1b4dbe381c695fc7498fb17059ec6ac138b9726c SHA-256: 4af06cc6b88f8f5a1e00dc3b2488ec3591581f1fa5339685df7f4b9774d429cf
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aba48de04ca---pifenusinuragiwabawe.pdf In PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/56982862168.pdfIn PDF document text
    • http://jhdljz.com/userfiles/file/1625908419.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/17784933489.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef7ba2402e---44688513138.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9b594519c457250ed60cb3c376e8a84d/75657424296.pdfIn PDF document text
    • http://florylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/94960550803.pdfIn PDF document text
    • https://studiovizia.com/webroot/img/content/files/86123542025.pdfIn PDF document text
    • http://qiuyutv.com/userfiles/files/20210718010318.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16102faab4f97d---fisagoxopavonotabaner.pdfIn PDF document text
    • https://cahayamimpi1.com/contents//files/20771165294.pdfIn PDF document text
    • http://twtipa.com/upfile/files/2021/07/25/koditarubetafus.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/rafidure.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/605d115c1984b39d3d9cd3dcbea67fff/5085482388.pdfIn PDF document text
    • http://spamsmsgiare.com/media/ftp/file/mazurexofopajezelureve.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160fc2c83de4a1---79261561344.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c9c2efc2fc8---tuvozifawizapikuvotuzizu.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/37204638d50ac83f758bbdc85a5656ed/22580747894.pdfIn PDF document text
    • https://datxeninhbinh.com/data/dulieu/files/sefodovobuw.pdfIn PDF document text
    • https://mimpi1pusat.com/contents//files/tokavoxizisin.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/t4dfsrfeg01btk0t1ebolotod2/77745269598.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=transferir+saldo+de+una+tarjeta+de+credito+a+otraPDF 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_off0000efbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000107ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CE 18040 bytes
SHA-256: 768875936a7f766f5750f6933f19393748213fa991a77ad93c1f7ad4818a93b1
font_02_sfnt_off00013612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13612 10660 bytes
SHA-256: 1e608a34f1152be1bff7c6427558ee6ef00ab0c5586e65a3695355a4afa4d3c7