Malicious PDF — malware analysis report

Static analysis result for SHA-256 af2b76cbe310b75e…

MALICIOUS

PDF

70.9 KB Created: 2021-09-25 12:46:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-21
MD5: c3b9f4b5effd3817b23a7dc512b3439a SHA-1: 129cdd8f9406d7bd23eb02e51a1fe228a39881df SHA-256: af2b76cbe310b75e46dfaf49efdd8fe8e38c37bc1c9f1cc02f97723277cec19d
164 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://yuvasarkar.org/userfiles/file/fonabemagiferani.pdf In PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161322ee9a60b2---kujezoluwurimex.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613602f492f64---39488437138.pdfIn PDF document text
    • https://villanakarin.com/userfiles/files/20453880022.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/jutinodaje.pdfIn PDF document text
    • https://emmaushuis.org/pages/jusudalujes.pdfIn PDF document text
    • http://phutungtdc.com/upload/files/77367428255.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/e9de8e07ceb608eab0e58accf9b538c3/refofi.pdfIn PDF document text
    • https://lekkermooi.nl/userfiles/file/28813379513.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1614b629815bb1---5711028940.pdfIn PDF document text
    • http://thanhlapcongtykiengiang.com/upload/ck/files/kojeditamalikuja.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/hjjqnu1rp7eb08bktuctgpdhc6/59567483521.pdfIn PDF document text
    • https://hosrem.org.vn/ckfinder/userfiles/files/larefofipos.pdfIn PDF document text
    • http://obkladlazby.cz/userfiles/file/29802261105.pdfIn PDF document text
    • http://park-seversk.ru/other/js/ckfinder/userfiles/files/78595739572.pdfIn PDF document text
    • http://chinahongji.com/d/files/7868120025.pdfIn PDF document text
    • http://www.udelimpa.es/ckfinder/userfiles/files/58229148092.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e32d392de2---xuxafexezezowaketopi.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/161452d9f623b4---dulogoloxumiwukuxagugaxu.pdfIn PDF document text
    • https://www.truckersplantparts.co.uk/ckfinder/userfiles/files/40627928618.pdfIn PDF document text
    • https://sonerofset.com/userfiles/file/lejijidilorasejaruwum.pdfIn PDF document text
    • https://history.tlshaa.org.tw/ckfinder/userfiles/files/87185527967.pdfIn PDF document text
    • http://ideal-site.ru/userfiles/file/58403887155.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=toxicwap+2020+movies+downloadPDF 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_off0000b245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB245 16552 bytes
SHA-256: e9fb9799a2361b0ee87af6f627051b107513adb7f5261b1b485c92ff45eda0f9
font_01_sfnt_off0000dc9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f4b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B1 10936 bytes
SHA-256: 9dafade3bfc4daac87cf0b3f5cafc509ad854bdcae8223ea0b3875b3cff9025a