Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e31df2fdde44e3a…

MALICIOUS

PDF

81.4 KB Created: 2021-09-12 04:50:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-19
MD5: ca9138951111cfdcee49ba11c2f4729b SHA-1: 918ecda547cdc8f11ffe66b79ce3763bf62745e3 SHA-256: 4e31df2fdde44e3a5b7e7382d8e5199a612c9fdd3e8b6489fdd828fa2d26bb4a
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://fusiongrup.ro/userfiles/file/86653432020.pdf In PDF document text
    • http://dietetyka-24.pl/images/files/72270164699.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b3ba434f01---14916306157.pdfIn PDF document text
    • http://df-foundry.net/d/files/50253233613.pdfIn PDF document text
    • http://greatwalledmond.com/ckfinder/userfiles/files/wilomezebevidafo.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/407646316227c65d04126411f6f85105/47338380739.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/663607de8e4d46138b759ca6045e79a7/36241344483.pdfIn PDF document text
    • http://sindikat777.ru/ckeditor/ckfinder/core/connector/php/uploads/files/wataxigapaxut.pdfIn PDF document text
    • http://bigdoughpizza.com/uploads/files/lozepufugawigexi.pdfIn PDF document text
    • http://tpfish.com.taipei/archive/upload/files/kasovokenedilutobexeko.pdfIn PDF document text
    • http://abwcrainhwy.com/uploads/files/nofaruzibatemubaxorawuwo.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/76094302952.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/pufuguxob.pdfIn PDF document text
    • http://texinpack.com/uploadfile/file///2021090310185626.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131a5f3b2546---72658631885.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132c2a5d1cc3---75499144578.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139ed80e08fa---19435074292.pdfIn PDF document text
    • http://superfishinglewood.com/uploads/files/moravokilu.pdfIn PDF document text
    • https://hojoairport.com/images/file/12167524970.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613976c0d8dfc---mosawetikovexisupelipi.pdfIn PDF document text
    • http://museodegliarazzimarsala.com/userfiles/files/47317952980.pdfIn PDF document text
    • https://jordanadams.com/ckfinder/userfiles/files/42516131547.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/5c7f9f97f6825cc7d360463b473a5b6a/82888498751.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=block+a+website+in+androidPDF 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_off0000da0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA0B 10732 bytes
SHA-256: 04ce1fd6e2645bc16c1615c7564524d79d78c541637b18437664340e0909a797
font_01_sfnt_off0000f2ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010aff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFF 17424 bytes
SHA-256: bf71da286b52cbf0d923b6ef2c5114ac5fa40bb32c817c89cf119222402e8c63