Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e355ff5828311a1…

MALICIOUS

PDF

121.1 KB Created: 2022-03-30 22:50:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-19
MD5: b6a45ca968eeb77788db695a2f575f30 SHA-1: 2d8232fe11f62551be16c6ae757f7a4800c613da SHA-256: 4e355ff5828311a1eb60b66f7926c9531c572a5a34d76b114de1ea749e8b51a3
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. 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://yoyep.co.za/YmrXLWy8?keyword=principios%20de%20economia%20mankiw%20solucionario PDF link annotation
    • https://www.ozkozel.sk/kcfinder/upload/files/ferotugazukofevibifenow.pdfIn PDF document text
    • http://webbuilders.com/files/file/tovunemuge.pdfIn PDF document text
    • http://honeystraw.com/uploadfiles/file/mijojigokarubadofosexabo.pdfIn PDF document text
    • https://betentour.com/sites/default/files/file/wowagigaronujuvejizew.pdfIn PDF document text
    • http://hamkr.com/userData/board/file/10288397217.pdfIn PDF document text
    • http://cen7dias.es/userfiles/files/62206693095.pdfIn PDF document text
    • http://valleytechltd.com/assets/ckeditor/kcfinder/upload/files/pefewubikek.pdfIn PDF document text
    • http://filipdegreef.be/uploads/files/65952483651.pdfIn PDF document text
    • https://dovolena-jiznicechy.cz/uploads/kamajige.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1623ea91c9a9b0---bumadetoka.pdfIn PDF document text
    • https://szerokiewody.pl/files/files/76750739218.pdfIn PDF document text
    • https://www.propertymegamart.in/admin/ckeditor/kcfinder/upload/files/55731422073.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/02f346qll5q1t91r5dpmon8m26/68147517234.pdfIn PDF document text
    • https://vectronic.tech/admin/ckeditor/kcfinder/upload/files/wifozimuru.pdfIn PDF document text
    • http://nigerseedindia.com/uploads/batixidonesa.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/162039c0cedfdb---rukoxasemakaxitevizesi.pdfIn PDF document text
    • https://www.miroku-mfg.co.jp/system/js/kcfinder/upload/files/kagimuregopeja.pdfIn PDF document text
    • https://www.edaas.com.tr/admin/kcfinder/upload/files/lidiloduzaredunurotadifa.pdfIn PDF document text
    • http://www.jasolasia.com/image/upload/File/2247919560.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
stream_007_off00017f9a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17F9A 22764 bytes
SHA-256: 1050000462513dca53bf2bd8191cd2e616a73d6075330946834c14e4670abc91
font_00_sfnt_off000168fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168FB 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_02_sfnt_off0001bb3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB3C 10856 bytes
SHA-256: b52a9872ceb2e86b54c052f2b8a634d1b515ae46a4a9baa765852d14f422cfd2