Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdf6bb9749b90a51…

MALICIOUS

PDF

141.2 KB Created: 2021-06-25 22:54:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: e4d9725de0535d64adb31a8e4bd0d902 SHA-1: 9fd72f04ecebeca6e007300692f21bd5b2f07141 SHA-256: fdf6bb9749b90a512a22d5fdde20338176dc0544297e1bcbe6f487c6f2a48b93
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing or malware distribution lure. It contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, suggesting an attempt to redirect users to malicious content. The PDF structure and embedded links are consistent with techniques used to deliver second-stage payloads or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://ketchas.ru/uplcv?utm_term=top+middle+linebackers PDF link annotation
    • http://hzjksj.com/images/upload/File/31424777805.pdfIn PDF document text
    • https://oteaexpert.fr/cite_imgs/file/fizevodozusavatovanumu.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/52700415436.pdfIn PDF document text
    • https://alibabaoman.com/basefile/alibabaomancom/files/89002173168.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2e2d7a618---jisafobidabanojaxe.pdfIn PDF document text
    • http://reunionclass.com/clients/7469/File/jamapowofotosoko.pdfIn PDF document text
    • https://nenanhduong.vn/Upload/files/8654754488.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6acb3e32cc---winenedukutoramoxi.pdfIn PDF document text
    • https://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/fb1941830ec4660351321bf79093891b/nufatuwajoxuk.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/2eefa682910dd20b40499e89e5393d32/87490325121.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160706306e7337---67327539786.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/20919631199.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cba59ee008---ramut.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afe0360a658---11256276470.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160823f2d5eb54---gupujivetukewixoner.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/fb4285f8c2b9504a788681cdb2a2178b/40371521063.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a4ea4af60---gexixewotul.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160743ba5c848c---zitupadixugetebepeniz.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a79a7838b74---lupawulelusagivis.pdfIn PDF document text
    • https://grandhotelbulgaria.com/userfiles/file/84715802803.pdfIn PDF document text
    • https://aplusadvance.com/naver_editor/data/file/48714045142.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/bfae54d3d460ced4c36dfc56880b1c2d/51305462343.pdfIn PDF document text
    • http://slsnn.ru/content/file/titisuginoxagopipurod.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/c7ggoisls2dcqs8lekpdmp4798/gefolir.pdfIn PDF document text
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094968e4296d---78144940503.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_off0001ca4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CA4C 17008 bytes
SHA-256: 7650beae5517bde3ee65a16676638c0f4c5f183b09fadd58ca3133fe33d14a01
font_01_sfnt_off0001f69b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F69B 10772 bytes
SHA-256: bc7557bf8e3c70593b1c7b7780315842a69a84e4c8fd1356103a742062a4e41e
font_02_sfnt_off00020f10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20F10 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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