Malicious PDF — malware analysis report

Static analysis result for SHA-256 7823481f7fb40a33…

MALICIOUS

PDF

312.1 KB Created: 2022-01-28 13:14:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-16
MD5: a6b97f811afd2af4ff6e82f79ca0137d SHA-1: 870a5e7d5101162be3004155a8185dff35eb4405 SHA-256: 7823481f7fb40a33c3e8acee2a978c5dd8c4ba8f664c8c463bd7ca98b073d970
174 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.8028

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.
  • 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 https://cafij.co.za/XSRYdR1H?utm_term=grossman+cardiac+catheterization+pdf+free PDF link annotation
    • http://nanjing.chinatupai.com/web/js/ckfinder/userfiles/files/pabiguzow.pdfIn PDF document text
    • https://cqhuaan.myhost360.cn/upload/files/11-26-15-01-55-47.pdfIn PDF document text
    • http://satisfytech.com/ck/upload/files/87274148213.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/161408f6ba0bca---79039380113.pdfIn PDF document text
    • https://www.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/94671837711.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16165c95f9be24---jefovuwifilivi.pdfIn PDF document text
    • http://gruppocinofilomarsalese.com/userfiles/files/57913496739.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/9a489ba3a3a0e5960e32e9544bf23d69/mazonupewazefunukobi.pdfIn PDF document text
    • http://hotstamping.pl/files/file/15548311507.pdfIn PDF document text
    • https://hotelpancharatna.com/assets/userfiles/files/tetanax.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16131dc9f6a41e---54176688030.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/161862691e2487---37569335411.pdfIn PDF document text
    • http://radio6deenero.com/uploaded/files/49333691617.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/56828460552.pdfIn PDF document text
    • http://lindendirect.com/tempimg/file/79451488519.pdfIn PDF document text
    • http://accronline.com/userfiles/file/vuwufal.pdfIn PDF document text
    • http://i-physiology.ru/upload/57354687321.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/pujejavivikuw.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/jomasemimafebun.pdfIn PDF document text
    • http://meteoratourismactivities.com/files/files/pufakizajamutejelul.pdfIn PDF document text
    • http://kutscher-customs.de/gfx/userfiles/files/xivulazeradefubutezumupun.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00047306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47306 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_01_sfnt_off000489a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x489A5 17692 bytes
SHA-256: 3290ab44f92f45b51aea7cf28254036afcb5775d8dc6d2866744fcb0de3e53f7
font_02_sfnt_off0004b800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B800 10940 bytes
SHA-256: 82db1c42cd8cad89b11d315117d14e87e446487291b524e4bcd3a3a7823c76ea