Malicious PDF — malware analysis report

Static analysis result for SHA-256 445e4223d069fa83…

MALICIOUS

PDF

266.7 KB Created: 2021-06-28 13:19:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: 4e18d79b6eb0c5d54b8426f331605004 SHA-1: e264c29467eb88087b2b42bae01471258099f44f SHA-256: 445e4223d069fa838e7c7f577b5e341262eb26956f1de9efee1b3612f87ef9d4
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress sites and an SEO redirector, suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_UTM_REDIRECTOR_LINK' specifically indicates a lure for free downloads, likely to trick users into downloading a malicious payload. The ML classifier and ClamAV detection further confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9692

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://queure.ru/uplcv?utm_term=sonic+the+hedgehog+movie+123 PDF link annotation
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/a1e17dc403a2acdfc8cd2704d3fd20bd/8564998569.pdfIn PDF document text
    • https://network-italia.com/file/vopepuzegixofupexa.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160721d5644e04---pezemavupimovu.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/woduwudexakeparosutevir.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/98291f9c50764b2baff3dee0c28067fb/kalegiga.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f36d957a7e---nimobuwagalomi.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/69558891041.pdfIn PDF document text
    • http://vasamo.org/pds/userfiles/files/97065832924.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/28cd49ef299805179cf6a5ed738ef7b8/bumunavigatox.pdfIn PDF document text
    • http://armanetti.com/images/wuxip.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/xorefofidamaguki.pdfIn PDF document text
    • http://grandchainfamilyfoundation.org/clients/85333/File/tusifalowejigeje.pdfIn PDF document text
    • http://www.srijonihealinghome.com/fckimages/file/16409692138.pdfIn PDF document text
    • http://apartmaji-zunicmile.com/uporabnik/file/9413461979.pdfIn PDF document text
    • http://ozona.pt/wysiwygfiles/file/wexemevenarefoweba.pdfIn PDF document text
    • http://szalkasszorutacskok.hu/app/webroot/files/content/files/foverawejoxaxiximu.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7bc38af514---pinojujimujuzufolajopu.pdfIn PDF document text
    • http://www.salpasafarit.fi/tiedostot/files/bezabaxedivabak.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160a553588f0a5---vevoxefuvemomitudegepe.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b1313201f75---46228446720.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/5b715baf9f7ddd2230142cfc547fdff0/42634041205.pdfIn PDF document text
    • http://clinicaveterinariagussago.com/userfiles/files/84347168238.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160aaafeee47ee---rotubogobisivorabo.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/e127d0207a454f26d78fc8d1bb2abc0a/bejizokixixurofixeg.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 PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00038e53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x38E53 10824 bytes
SHA-256: 128f22094ec210188361c77c34a13fb21d5d9f7af2934f96914db5d8d0d7db8a
font_01_sfnt_off0003a708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3A708 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0003bf16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BF16 13644 bytes
SHA-256: 97e79229f2370aefaf6ca14a3ef23ac7264b6fa84aee058d9be74184558bd4f1
font_03_sfnt_off0003e9d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3E9D4 19216 bytes
SHA-256: 4eeae2d6eb9c2371be2bcb86393d1c8976c4b47dff85d01dd67f58d1c18fb14b

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