Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fdedc31eefa08eb…

MALICIOUS

PDF

88.5 KB Created: 2021-06-25 23:17:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: abc2bc7d368a95eefda12f0bed4def60 SHA-1: 08ed533a5ad1374c783ce38fe8dbd247091f79f5 SHA-256: 4fdedc31eefa08eb1af2b31898924e3dd8b0e0dc988c0c969725d61ae9e42017
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • 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 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://huntic.ru/uplcv?utm_term=have+a+nice+holiday PDF link annotation
    • http://pogservice.ru/userfiles/file/mizofepabigomi.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/6670bcf1efe9cf3ccc35e9ef2917acbb/55910850836.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c92ff7aee2---19225041580.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/edc15cc5ed1f68d376cb9c5cd7149a84/jalibusajumin.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/norikafifegume.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f49d883b60---zipudekilomirewomadopob.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/37kpb4hm78f0cq88rhs9g2cmp0/28636407938.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094bdc8d6d11---84108866512.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/sodiwulepix.pdfIn PDF document text
    • http://busanpc1.com/upload/fckeditor/file/xabekokurafomevubifib.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160769ac713f6e---wivul.pdfIn PDF document text
    • http://adacu.org/userfiles/file/20210621142632.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/37c5ac8fb21be26da803b199f504e356/64876694716.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/pobas.pdfIn PDF document text
    • http://hanleyresources.com/images/85770553386.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b981523f94e---41330549637.pdfIn PDF document text
    • http://erbamedica.org/userfiles/files/15147043476.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/61247d7661bf4f072026d9d207e04a98/mududo.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/fofabosilefubobizaveveti.pdfIn PDF document text
    • http://cepsagibyachtfuels.com/images/photos/13999148492.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/27663851769.pdfIn PDF document text
    • http://renovator.cz/files/file/70604716916.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/f65cesm1t6nmgkn9g4moulgq72/38652900351.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082f5d352afa---pifukixejabinosoxoki.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/ci99o75tagvdo30kvt46033al2/nugafexegebugeripajo.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/160740a7b66155---redikuji.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_off0000f918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF918 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001112a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1112A 17060 bytes
SHA-256: 4370569f975d1c0b2cd8b77ce00d7f90f669ba776a6f402b0050541db71e71e0
font_02_sfnt_off00013dbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DBE 10272 bytes
SHA-256: c44eefd4c7d578efe4cfcd763eb2f6af417f5155403c586140d1cc71d2734bbd

Open this report in the interactive analyzer, or submit your own file for analysis.