Malicious PDF — malware analysis report

Static analysis result for SHA-256 4de50d4436578763…

MALICIOUS

PDF

413.8 KB Created: 2022-02-10 19:17:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-29
MD5: ae316e58a8d41ef7c20809ad78810d88 SHA-1: 10d104e2331759c126cf51e2219530a742239fef SHA-256: 4de50d443657876334970ea830ad0e8ba57657506eb1d246a96758b9fc885258
191 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.5720

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.
  • PDF advertises pirated movie streaming/download medium PDF_PIRACY_STREAMING_LURE
    PDF rendered text advertises free full-movie streaming or download using piracy-brand names or a 'full movie + download/free/watch' intent phrase — recovered after folding the styled Unicode confusables the campaign uses to hide those keywords from plain-text detection. These are disposable SEO-spam carriers that route users to malvertising, fake-player, and scam pages; the PDF itself is inert.
  • 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://yoyep.co.za/XSRYdR1H?utm_term=daily+express+cryptic+crossword+answers PDF link annotation
    • http://nitecoreromania.ro/files/file/gobat.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/161b300cb57c86---22743627623.pdfIn PDF document text
    • http://rescue119.org/userfiles/file/77394191791.pdfIn PDF document text
    • http://www.xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/9974284559.pdfIn PDF document text
    • https://uhcp.com/editor_upload/file/58611283968.pdfIn PDF document text
    • https://www.iconcollege.ac.uk/AdminPanel/public/ckeditor/kcfinder/upload/files/rofefotokifip.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/a717b6188910da54f19190e7512ce588/82007979962.pdfIn PDF document text
    • http://f-kcc.jp/user_data/userfiles/files/kazonofu.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/6gfb8jaibs83988d1n20i66pd5/binanipu.pdfIn PDF document text
    • https://mkserwis.pl/userfiles/file/40193024947.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1619d64e0e53a6---98660085197.pdfIn PDF document text
    • http://jiuhuapm.com/upfile/file/46296204901.pdfIn PDF document text
    • https://topas-rus.ru/media-temp/img/uploads/files/58340761763.pdfIn PDF document text
    • https://shibbirs.com/media/files/lopuwotalubotifub.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1611dc20dc517d---ribejawinepigipokovobif.pdfIn PDF document text
    • http://www.mcageorgia.ge/cms/kcfinder/upload/files/tididaduxamulazazelox.pdfIn PDF document text
    • http://slkuang.com/v15/Upload/file/202110151554544151.pdfIn PDF document text
    • http://modelseafarm.com/kweb/ckfinder/userfiles/files/48506021389.pdfIn PDF document text
    • https://www.stc-tn.com/webroot/upload/files/86924445963.pdfIn PDF document text
    • http://specel.kz/app/webroot/js/kcfinder/upload/files/kapisevosisajogofure.pdfIn PDF document text
    • http://ayurveda-shiatsu-qigong-nice.com/upload/files/1107203272.pdfIn PDF document text
    • http://toyotaprius-custom.com/js/upload/files/sudode.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_off00060452.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00060452.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00060452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60452 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_01_sfnt_off00061b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B6D 19032 bytes
SHA-256: c79b83b713a7fc72d0e9eb7eac440cd6acab6e59c5dc170757bb2ef9920686bd
font_02_sfnt_off00064d6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64D6B 10812 bytes
SHA-256: 2e1a5d41c1bdb0596a94f8f9e3e881a9739f24940c92743b8c3c7bdab757ea26