Malicious PDF — malware analysis report

Static analysis result for SHA-256 215c26c92028ec54…

MALICIOUS

PDF

101.7 KB Created: 2021-07-04 02:20:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 63657ffb1b8bb9a0e5c1c9bfcb022306 SHA-1: 891ad97635368ff41c1cf48ba625fc9ca7be91a8 SHA-256: 215c26c92028ec54777b8779e873abf530365a3cff0224fc3a532373e405f3a7
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which appear to be hosted on compromised WordPress installations or disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malware delivery or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9803

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
  • 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://nomylo.ru/uplcv?utm_term=criminal+justice+quotes+sayings PDF link annotation
    • https://securitegenerale.tn/userfiles/file/35148434270.pdfIn PDF document text
    • https://esprimagroup.com/userfiles/file/gatujozejedap.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b15d075c2---kozalejezudigafuvuli.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a95ffcc1236---49559648712.pdfIn PDF document text
    • http://healthywithhart.com/res/file/21377311376.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/n49j2vaq00h4ai2vm3s5egtqc2/xejini.pdfIn PDF document text
    • https://chiuman-hk.com/images/file/larewuwoduvojomamaxe.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/abc303ee08589bbcdb3a4e483f1928c0/pamaxevafadaguzumus.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/edeb6krvmmututi6cscb1t4g82/687663885.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/94f5t1or8dc2t44lathujmp82c/devuso.pdfIn PDF document text
    • https://medtek.vn/storage/file/satigolo.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/kutakarivuzezuzajob.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160847abb2d639---tepedowosofe.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/46066364470.pdfIn PDF document text
    • http://bigandtallking.com/userfiles/file/58313833283.pdfIn PDF document text
    • https://actorconseil.com/files/file/65925297893.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609005b477cc7---vuxipitategofax.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/81787777466.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/bexad.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/0d1685740367dbd3ceff0c4841cbd8d7/44988565174.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/4ekli6arqrgfs4dr7te2st00v0/90014542656.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be6ca80b2f5---vekizivepegupopuseruzepam.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cfad661c6f6---tonobakikawe.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/191c8561d9e774df9fbc7439148f0224/kobupowidavoxononixaki.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/mmn1dsh1p7glttrs4ptr68lcn2/77775241421.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/6c1c26d82a46a9eaaf65aac8fa436baa/gokuwavotawe.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_off00012b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B4F 17140 bytes
SHA-256: 82a6fc66693ccd664fdcecdd8c38eb4caa1f070a8b355fbbe1e31f36c1e87025
font_01_sfnt_off000157b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016fc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FC7 11092 bytes
SHA-256: aec7b3ea05b413d030e691fd83475706daa78516e6b38674274b5ff42c49ef0b

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