Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d88126e2840923c…

MALICIOUS

PDF

71.2 KB Created: 2021-10-08 02:28:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-18
MD5: 23b029ce46deedc262f696657adceb58 SHA-1: b57136f93d8839caee9357edbd16aed3df9a7bbd SHA-256: 5d88126e2840923cf43b09a6dacef508c95226a8ff3fd016071f6072f29f635b
94 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://fernandopelosini.it/userfiles/files/83582810800.pdf In PDF document text
    • http://top1np.com/ckfinder/userfiles/files/28617111672.pdfIn PDF document text
    • http://grandp.ru/userfiles/file/fenixobasetiwuwibivoneret.pdfIn PDF document text
    • http://sincaremedicaltour.com/js/upload/fekagiligula.pdfIn PDF document text
    • https://iieng.org/editor/ckfinder/userfiles/files/zonojenegonene.pdfIn PDF document text
    • https://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/wupapev.pdfIn PDF document text
    • http://villaelen.it/userfiles/files/totilaxa.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1615c96f5dcc47---7103840246.pdfIn PDF document text
    • https://stealthwindow.tw/uploads/files/202110071419283938.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16146ab425a7d1---xamepakos.pdfIn PDF document text
    • https://cuacuonbentre.com/upload/files/lufezemido.pdfIn PDF document text
    • http://beganijewellers.com/ckeditor/ckfinder/userfiles/files/zometefelajobefinasefaw.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/kepomojazabululelute.pdfIn PDF document text
    • http://liceoadultos.juniorcollege.cl/userfiles/files/15172681344.pdfIn PDF document text
    • http://www.fd.ntou.edu.tw/ckfinder/userfiles/files/92246497638.pdfIn PDF document text
    • http://grafiport.com/userfiles/file/nasujopavipatogeribijupir.pdfIn PDF document text
    • http://gold-carsales.com/js/upload/files/12714898521.pdfIn PDF document text
    • http://hmed.vn/upload/files/3993777994.pdfIn PDF document text
    • http://stmrcstvm.com/userfiles/file/24638208353.pdfIn PDF document text
    • http://vinhhangvien.com/upload/files/15432405318.pdfIn PDF document text
    • https://playindiano1.in/ckfinder/userfiles/files/92003163960.pdfIn PDF document text
    • https://estudiowebcolombia.com/ckfinder/userfiles/files/3733992058.pdfIn PDF document text
    • https://sinarwaja.com/account/files/sulukijusepuxumopitije.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=incorrect+order+of+bond+angle+isPDF 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_off0000b600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB600 15772 bytes
SHA-256: 664e8ee3abd4c7a0b6bfead5499b677b0cf60be0a293b169bee409ab8d5dafe4
font_01_sfnt_off0000de4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE4C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF663 10740 bytes
SHA-256: 7a9530a6ac4130e32101784c530747848ea15814a6bad966265b10be262c1ad8

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