Malicious PDF — malware analysis report

Static analysis result for SHA-256 f99d1470cd6fd7a8…

MALICIOUS

PDF

96.1 KB Created: 2021-11-15 07:36:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-13
MD5: df8c180b703c16ae37912d85c0b5bf2c SHA-1: 88efa572e96b737925779937e4624d9573a28bef SHA-256: f99d1470cd6fd7a89cdc9754aa985cf2745ed306c4611ae9f85bf7828856570f
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://dptour.net/bot/ckfinder/uf/files/83092497600.pdf In PDF document text
    • http://oikoscoccatoarchitettura.com/userfiles/files/dulolamewanakelulezedu.pdfIn PDF document text
    • http://safedoorsystems.com/cmsimages/file/70345989031.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/bl4oteenn8rjqq6d2h8t609ec5/73243069294.pdfIn PDF document text
    • https://mimpiindah88.com/contents/files/tuwakafo.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/potezarepejod.pdfIn PDF document text
    • http://liburnia.pl/userfiles/file/77488540163.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/38583800605.pdfIn PDF document text
    • https://hgindustrial.eu/userfiles/files/81323264374.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/36422822851.pdfIn PDF document text
    • https://nyirfa.hu/uploads/files/lefapafapanizogono.pdfIn PDF document text
    • http://systemsbiology.at/uploads/assets/file/33495376142.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/luwixiduxuwubizefinu.pdfIn PDF document text
    • http://zatuchlina.cz/upload/file/lojobexabowiresatod.pdfIn PDF document text
    • http://xn--9i1b14lzokxjcrti5um.com/upload/fckeditor/file/95941622300.pdfIn PDF document text
    • https://goodmix-psc.com/userfiles/files/vagogepiniverul.pdfIn PDF document text
    • http://compagniaviaggi.gattinonimondodivacanze.it/themes/userfiles/files/72522720904.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16191dfb2202de---87663079349.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/16150504f8f1af---78682613993.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614ffef6dbaec---gepipuki.pdfIn PDF document text
    • http://eur-idea.com/userfiles/file/26982039964.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/guzakuzudugozopegu.pdfIn PDF document text
    • http://nikolabartakova.cz/files/file/tinomekifivurax.pdfIn PDF document text
    • https://cmf8.ir/data/file/79470073447.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/oscUj7J0Gjw/uplcv?utm_term=project+on+noise+pollution+pdfPDF 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_off00010da3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA3 10680 bytes
SHA-256: c783ead8db80431f8c7d9c3484a0567a221bef56f961b5c15eb35c71a64bf576
font_01_sfnt_off0001262e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1262E 20044 bytes
SHA-256: 0114639290a4e2b4e0fb642bcb5c8ac89a42901fd4cb44f85c5b405d7af6026a
font_02_sfnt_off00015b6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B6C 16540 bytes
SHA-256: 45015263e28dbf00792e0fa83ae0fb9123af5110209f191c00797c49350166ef