Malicious PDF — malware analysis report

Static analysis result for SHA-256 5258d059b0af1048…

MALICIOUS

PDF

116.8 KB Created: 2021-08-03 08:59:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: c0de581c4196e454ad90a4828b2bea8e SHA-1: a7f645a6a5bd711fb523efbc84afe758fe65e17b SHA-256: 5258d059b0af10481c84ce6c59999053302eb0416a188ce220a24d068b388fbe
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to download a password-protected archive, a common tactic to bypass gateway security. The ML classifier and ClamAV detection strongly support a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/07535f1bc2622bc6776f4a33a9cf8d20/losenijofax.pdf In PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcce79272b---11667501163.pdfIn PDF document text
    • http://progettogeometra.it/userfiles/files/xaxofuf.pdfIn PDF document text
    • http://druckmaschinenservice.com/uploads/fce/files/94941341230.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbc20ba25f---jujifilobukuvaxisonezonox.pdfIn PDF document text
    • http://webinaris.biz/ckfinder/userfiles/publics/files/tudevixelig.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/ef5e338bf638d5fabafdb09d6cc80cea/70725641177.pdfIn PDF document text
    • http://gruppocreta.com/userfiles/files/41484651353.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/juvujekezusibe.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/gppec20mhlmdh9f03e7pq0airi/65327921468.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/60758278357.pdfIn PDF document text
    • http://arnold-sitter.com/CKEdit/upload/files/durotubaba.pdfIn PDF document text
    • http://houselandia.ru/files/vasuwawijuxawamewogo.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b98def8783b---7717930191.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16086458846dd4---xolejalibopob.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f676f62a700---19453582290.pdfIn PDF document text
    • http://gapoom.com/upload/fckeditor/file/bewegut.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bda019947cf---59750284446.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e5a934d0344---tefavinixef.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098763a72701---sijaj.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a73a749419b---zofaz.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/m923807vbl9038i1tkd3s7j1p0/61684873379.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd80880c21---30914375588.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f34d5d740b9---xinaj.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/0837c584f02486a867a356c9f5fb449c/vopubezakupumewoladupux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=cuales+son+los+5+pasos+de+los+primeros+auxilios+psicologicosPDF 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_off000164df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164DF 11124 bytes
SHA-256: e0d9a0a6392c19ab2e25393cbf5a335d95387fbd1eb21c7c4cf02cd28fd70b51
font_01_sfnt_off00017ea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17EA3 18052 bytes
SHA-256: 3b8e742d535aa52bb60384267a42c2893e9a5b1816cc37c67c507b6d82b7526c
font_02_sfnt_off0001ace3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ACE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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