Malicious PDF — malware analysis report

Static analysis result for SHA-256 42597e1731a68d83…

MALICIOUS

PDF

83.2 KB Created: 2021-09-06 17:30:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-15
MD5: 6634018a150d1fee73e59709c1c98709 SHA-1: d6c738e527be434c6cc6c5e3a0918290849e2124 SHA-256: 42597e1731a68d83f844d4046cf8dadce1b36c4b8447e3ddf2cc3afb9b39abcc
104 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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 http://woodwork.pl/ubezpiecz/obrazy/file/zizamekibobene.pdf In PDF document text
    • https://albizy.com/ckfinder/userfiles/files/20674829670.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/48184067444.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a366bf3ce01---finuresidazi.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/5524c371e53d3fc26c36aa7441e9e7b2/folamovilamamupego.pdfIn PDF document text
    • http://daiichihr.com/uploads/news_file/90691268369.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/9c2cef309ef73a8c14ce5453d24a0d31/puzonuzubularofabofi.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160b450208e089---zubodere.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/fukokakesizomimuworofi.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160983ec840ab1---kenipuseremumoluvirura.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16125c3f132125---kixisugexipapesagif.pdfIn PDF document text
    • http://garage-fuji.jp/js/upload/files/lixof.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608e782de19ff---36099590915.pdfIn PDF document text
    • https://badrivishal.com/media/89061720057.pdfIn PDF document text
    • http://studiocariola.com/userfiles/files/78649260847.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/sebibuwedogowezipolat.pdfIn PDF document text
    • https://matfreklam.com/calisma2/files/uploads/zipolegasul.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/cd7bc74e0277ef31c037f2a2abb13ff0/soxeguliseminujepidom.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608b0289e5d0a---pumonegixamapoxiboval.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/6icphehf2m24m2i3s5rnm9s45a/jezubebuxajojijanijumono.pdfIn PDF document text
    • http://marklaliberte.com/fckupload/file/tasafijixawevovoxose.pdfIn PDF document text
    • http://viral-list-machine.com/ckfinder/userfiles/publics/files/siworemezusot.pdfIn PDF document text
    • https://avistravel.ro/userfiles/file/gutakawanesosamagodez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=poetry+sad+in+urdu+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_off0000d77c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD77C 21504 bytes
SHA-256: 3b22458c41fd011505d4391ab68b33884f8aad8b8b0a9ceb9cddfacde91e55cf
font_01_sfnt_off00010e75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E75 10660 bytes
SHA-256: 4b688692531e0f952e23f7611b7eca68717a9d87d67df6497432c4abff0711d0
font_02_sfnt_off00012710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12710 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1