Malicious PDF — malware analysis report

Static analysis result for SHA-256 7828a18c63dbdbdb…

MALICIOUS

PDF

385.8 KB Created: 2021-12-26 01:15:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-16
MD5: 7d88700beadd2416f405b57c31017741 SHA-1: c9607f11cb3992eb48421010dfe95f432aec9f84 SHA-256: 7828a18c63dbdbdbfb0c6b7ea7320f92c3129afede70f0603cd45ce596eb07f9
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.8589

Heuristics 6

  • 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.
  • 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://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614bc19d34cec---nazamuguka.pdf In PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16182d1f05f3bb---ziwugu.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/16177eca88d271---50117468923.pdfIn PDF document text
    • https://weingut-suppan.at/files/jipek.pdfIn PDF document text
    • http://chiesamadremarsala.eu/userfiles/files/lirimikezej.pdfIn PDF document text
    • http://karpatskiles.ru/store/files/pipojoretowaw.pdfIn PDF document text
    • http://jcpingie.be/public/files/zenefatimix.pdfIn PDF document text
    • http://klemanpince.hu/files/file/minewaborivudosevuwedeg.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161a6d71d8cfa7---37815982244.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1618c92090485f---50033398806.pdfIn PDF document text
    • http://tianlanip.com/filespath/files/20210902142156.pdfIn PDF document text
    • http://d-a-s.cn/userfiles/file/49039041627.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/fuzinuzoxokubevadafivotix.pdfIn PDF document text
    • http://ipublicity.cz/data/file/45481179769.pdfIn PDF document text
    • https://lockerova.eu/admin/upload/documents/niluzajexulagukibigopipil.pdfIn PDF document text
    • http://doanekeyes.com/userfiles/docs/82505576572.pdfIn PDF document text
    • https://valerart.com/ckfinder/userfiles/files/95403396010.pdfIn PDF document text
    • https://willes-gb.com/uploads/files/202111161259304096.pdfIn PDF document text
    • https://tpijobportal.com/ckeditor/ckfinder/userfiles/files/xobarububowep.pdfIn PDF document text
    • http://xn--9i1b14lwsg1seumdzsx.com/upload/fckeditor/file/41175651688.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e6487e1975---28948536425.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/161a70f0e15fed---wujosorikobix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/oscUj7J0Gjw/uplcv?utm_term=accounting+interview+questions+and+answers+canadaPDF 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_off00059d5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59D5C 16972 bytes
SHA-256: 1a0f9b1af5069d31e13f62e1159b3798d32e71f10f98d9cec7bfb738beb5a98a
font_01_sfnt_off0005c905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C905 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_02_sfnt_off0005dfa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DFA9 10880 bytes
SHA-256: 4853009592598cc70588d5d578e468ec5c847db497de5a905096b890526482f3