Malicious PDF — malware analysis report

Static analysis result for SHA-256 87539b72768f529a…

MALICIOUS

PDF

283.0 KB Created: 2022-03-13 00:29:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-05
MD5: c6942db89357e29ba33f6045f64042fc SHA-1: 4ab667d31af159425ecaf2f1d82c87248918ecad SHA-256: 87539b72768f529af827090abe04dde512ce2fc63512e1d728d9b95c577230c7
174 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.5959

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://oletrans.sk/editor_uploads/files/kufikemixejukopi.pdf In PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/65c885260cebdff1784d3b4641157d0f/41561072008.pdfIn PDF document text
    • https://rotterdampools.com/contents/files/vusabujogokemomoranitowe.pdfIn PDF document text
    • http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/95843179181.pdfIn PDF document text
    • http://unicorn-furnitures.com/d/files/82735180642.pdfIn PDF document text
    • https://www.nasasquirrel.org/kcfinder/upload/files/38527468756.pdfIn PDF document text
    • http://websteravelandscaping.com/editorData/file/86364146189.pdfIn PDF document text
    • https://centralleiloes.com.br/admincentral/ckeditor/kcfinder/upload/files/53240496532.pdfIn PDF document text
    • https://domainedulacstellan.com/admin/kcfinder/upload/files/36369318065.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/2e935aeca0d41d6ee88be51159050ebb/kunedawujanemorivafis.pdfIn PDF document text
    • http://secretsocietygroup.com/temp/vinney/HTML/userfiles/file/25663029838.pdfIn PDF document text
    • http://sirindhorn.net/upload/File/mafozefip.pdfIn PDF document text
    • https://www.pepinieres-gey.fr/ckfinder/userfiles/files/jemuxixi.pdfIn PDF document text
    • https://www.scmribadeave.pt/sgc/Assets/Plugins/CKEditor/kcfinder/Uploads/files/65729204393.pdfIn PDF document text
    • http://2222.netsociality.com/upload/files/86989669827.pdfIn PDF document text
    • http://kiszelyugyvediiroda.hu/docs/file/91382979783.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1622a25498ed3b---gogaxavupibuxikeneturas.pdfIn PDF document text
    • https://hotelgaric.com/upload/datoteke/poguregoleni.pdfIn PDF document text
    • http://salda.se/saldus/kcfinder/upload/files/gufiru.pdfIn PDF document text
    • http://chinamakina.com/userfiles/file/sofenaris.pdfIn PDF document text
    • https://euronet.stonavka.cz/webpagebuilder/ckfinder/userfiles/files/53660313996.pdfIn PDF document text
    • http://xn--h1agcmh.com/ckfinder/userfiles/files/37510464585.pdfIn PDF document text
    • http://kanoonkaraj.ir/dbmanager/filebank/htmlgallery/file///41869034975.pdfIn PDF document text
    • http://headrepublic.pl/images/files/13821821551.pdfIn PDF document text
    • https://find-domain.lazy-online-shop.com/app/webroot/userfiles/files/samujuwiviwunu.pdfIn PDF document text
    • http://www.hzkontejnery.cz/ckfinder/userfiles/files/32680502280.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/2549594694.pdfIn PDF document text
    • http://timapools.com/uploads/file/89451859519.pdfIn PDF document text
    • http://matrix-work.com/uploads/files/bufaduxozobolosofitikukow.pdfIn PDF document text
    • https://discovercefalu.it/_data/images/file/85002229741.pdfIn PDF document text
    • http://zabbeleecooking.com/ckfinder/userfiles/files/15865637052.pdfIn PDF document text
    • https://dogudokum.com.tr/panel/kcfinder/upload/files/111461267.pdfIn PDF document text
    • https://bloodyoffice-dotrollsecure-com.budapestunderguide.com/upload/userfiles/file/zalizoledo.pdfIn PDF document text
    • http://poliinc.com/upload/files/72043223590.pdfIn PDF document text
    • http://xn--o39a91gvwm83kbsn.com/FileData/ckfinder/files/20220226_84999BE65EAF5445.pdfIn PDF document text
    • http://safetruck.gr/images/file/90491952230.pdfIn PDF document text
    • http://iba.education/kcfinder/upload/files/56552258243.pdfIn PDF document text
    • https://podar.co.za/XSRYdR1H?utm_term=late+invoice+letter+templatePDF link annotation
    • http://aan.kz/ckfinder/userfiles/files/13579697789.pdfIn PDF document text
    • 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 extracted file (font_00_sfnt_off0003fd50.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0003fd50.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003fd50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3FD50 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_01_sfnt_off00041470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x41470 10388 bytes
SHA-256: 53b72404ddd3e0ba4273fd6ad4b38d18b156968dcd31712888f0c4fe596f1924
font_02_sfnt_off00042bed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x42BED 18512 bytes
SHA-256: c6663a9dec31205e04d92f39becefda200e492cd80a53d7e7f4cdc1de1f0e92c