Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a1c377881445124…

MALICIOUS

PDF

225.9 KB Created: 2022-01-05 15:43:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-30
MD5: 4330d42ef534c434bc05dbba1716cfd5 SHA-1: 25a50d53829cdcb47f715bdc57c679b883c6e7a7 SHA-256: 5a1c377881445124e451d67d43813f69214b64036e9a910bb19989589e0c3fe8
174 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9515

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://xn--82ca1bkibi6eufn5bh1b7i3e.com/UserFiles/File/57243595737.pdf In PDF document text
    • http://studiotecnicolari.it/userfiles/files/73673272576.pdfIn PDF document text
    • http://an-professional.ru/img/files/file/84073546358.pdfIn PDF document text
    • http://americasbestwingsbeltsville.com/uploads/files/47011885079.pdfIn PDF document text
    • https://www.tzounakos-insurance.gr/ckfinder/userfiles/files/vapuj.pdfIn PDF document text
    • https://www.eclof.am/assets/ckeditor/kcfinder/upload/files/dirobibaw.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/zubonozuratimoj.pdfIn PDF document text
    • https://www.poole.ed.jp/system/ckfinder/userfiles/files/63583012655.pdfIn PDF document text
    • http://architettotamborra.eu/userfiles/files/60377181604.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/8dcd69dd55a933718a749f17e84a1b23/37110737823.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/161a4775b59b40---97412959925.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161a469a59aee6---21903094714.pdfIn PDF document text
    • https://ostrichtours.com/ckfinder/userfiles/files/laramovusikojede.pdfIn PDF document text
    • http://tetobox-budapest.hu/uploads/files/xitezomulupozasigofi.pdfIn PDF document text
    • https://recoveryrc.com/uploads/file/wigapomirewetola.pdfIn PDF document text
    • https://hanurichurch.org/ckfinder/userfiles/files/19581718675.pdfIn PDF document text
    • http://zsdbiopharm.com/upload/files/68646800285.pdfIn PDF document text
    • http://vucert.vn/uploads/files/70823088098.pdfIn PDF document text
    • http://cermak-expo.cz/data/files/file/76380702428.pdfIn PDF document text
    • http://birizgardenhotel.com/userfiles/file/ruzuxovugowumiki.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021120621092736.pdfIn PDF document text
    • http://www.farimar.pt/imgs/uploads/22678395959.pdfIn PDF document text
    • https://grupa-energia.pl/attachments/file/22950719824.pdfIn PDF document text
    • http://dungculamdep.com/fckeditor_userfiles/file/wekitu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/Z3ufxtS7Wvw/uplcv?utm_term=geant+de+papier+piano+sheetPDF 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_off000306f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x306F6 26244 bytes
SHA-256: f3cb3c9118e42aca411d5e8ca889d38c2c5d49cd70998e7c74075c40e4869c2d
font_01_sfnt_off00034999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34999 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_02_sfnt_off0003603d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3603D 10484 bytes
SHA-256: 91caf6778d4c2a063fe72b84bb7b0e5cfa0700718dac28e7382a886ae65a23fd