Malicious PDF — malware analysis report

Static analysis result for SHA-256 55210ce0c4a0d5d6…

MALICIOUS

PDF

626.9 KB Created: 2022-01-28 17:02:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-19
MD5: 02fa90f75786625fabfec60f4601da01 SHA-1: 45906bd1040636bb36d622548102856ae8f68af6 SHA-256: 55210ce0c4a0d5d66279ea86577b1296e76601c7760a9638a968b52904ea3040
216 Risk Score

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3441

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • 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://plantbiochem.com/ckfinder/userfiles/files/fijabuset.pdf In PDF document text
    • http://tangneylaw.com/admin/images/file/48654502593.pdfIn PDF document text
    • http://toyotarent.hk/FileData/ckfinder/files/20211023_FB3E386AFB6BC028.pdfIn PDF document text
    • https://el-tall.pl/pics/file/feniwesotomekanoki.pdfIn PDF document text
    • https://fu-ko-property-agency.com/webroot/editor-uploads/files/gapogafu.pdfIn PDF document text
    • https://zohopin.com/calisma2/files/uploads/pavuwejamasinajit.pdfIn PDF document text
    • http://xn--c1adbeke4asdefy.xn--p1ai/ckfinder/userfiles/files/84913912411.pdfIn PDF document text
    • http://wawa757.com/uploads/files/78820853575.pdfIn PDF document text
    • http://conganbacgiang.vn/app/webroot/uploads/files/rivititakiloxekozuxuwux.pdfIn PDF document text
    • https://projetovm.com/uploads/files/vajukox.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/08d3ce9b9fccebbf047c543e46f783d3/89230865805.pdfIn PDF document text
    • https://interstudy.net/userfiles/file/bilebujujevexadutu.pdfIn PDF document text
    • https://yaslibakicisi.net/userfiles/file/suloketexu.pdfIn PDF document text
    • http://www.mkfilm.it/ckeditor/kcfinder/upload/files/97328089063.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614efa464e910---gibukifuwojogebunulefib.pdfIn PDF document text
    • http://gabortech.com/admin/file/zimojuxuwasubi.pdfIn PDF document text
    • https://mehreganimaging.com/images/upload/files/12626762193.pdfIn PDF document text
    • http://sloplast.com/userfiles/files/puwegi.pdfIn PDF document text
    • http://secretsocietygroup.com/temp/vinney/HTML/userfiles/file/kavanobovobobis.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/161def84a9ef71---14073365725.pdfIn PDF document text
    • http://consorzio-csa.it/userfiles/files/segukitip.pdfIn PDF document text
    • http://hoangminhsaigon.vn/@dmin/js/ckfinder/userfiles/files/kunavekujigi.pdfIn PDF document text
    • http://tipsclubcr.com/campannas/file/jesutazikonavasuxo.pdfIn PDF document text
    • https://mgs-on-track.com/uploads/misc/files/46457152126.pdfIn PDF document text
    • http://goldendoodlesofthesierranevadas.com/userfiles/file/guxipixomijafutazunomufe.pdfIn PDF document text
    • https://myleague.vn/uploadfiles/kcfinder/files/tametekukimiparopop.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/17970932631.pdfIn PDF document text
    • http://www.videobezopasnost.ru/ckfinder/userfiles/files/vurom.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/davez.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/449ce39fa22266a482ce5e66b0d29c94/61899272847.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/71221613237.pdfIn PDF document text
    • https://anapobolivia.org/userfiles/file/95129139809.pdfIn PDF document text
    • http://bielle-srl.com/userfiles/files/58967020186.pdfIn PDF document text
    • https://ywint.com/ckfinder/userfiles/files/1634702517.pdfIn PDF document text
    • http://haustechnik-hagenauer.at/segijenunirogo.pdfIn PDF document text
    • http://bindashnews.com/userfiles/file/vuzafabilesu.pdfIn PDF document text
    • https://loheb.co.za/XSRYdR1H?utm_term=15000+useful+english+phrases+pdfPDF link annotation
    • http://s250801404.onlinehome.fr/img/uploaded/file/73522344444.pdfIn PDF document text
    • https://www.unimedbelem.com.br/painel_template/assets/global/plugins/ckfinder/userfilesfiles/muvozokofutamisosol.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_off00096032.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00096032.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00096032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96032 10872 bytes
SHA-256: b40968104aba3bf44c4c527b91f3fbcebd53d4ffa489d0e7fed90c79b0258c23
font_01_sfnt_off0009790d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9790D 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_02_sfnt_off00098fac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98FAC 17224 bytes
SHA-256: e950502035b90024b7cc28187f01191ffc6e4594fd8acc454e7afc81cee766a2