Malicious PDF — malware analysis report

Static analysis result for SHA-256 98f562a6b5be5393…

MALICIOUS

PDF

83.9 KB Created: 2021-06-26 18:03:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: eb81298c3a70508828a0f534b8d5e8db SHA-1: b214dcf9e2a2ba77c01425028cbdbc09e1132dc7 SHA-256: 98f562a6b5be539317fed44e3e3015b46c170fb033f690c7cfa1fdcdff57873e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites, suggesting it functions as a link farm for phishing or malware distribution. The presence of multiple links on disposable hosting and compromised CMS uploads indicates a deliberate effort to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • 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 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://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/6aeb4ac0572edb07a10ec4a8f8472b40/darogekomusaje.pdf In PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160a73ca7bc125---wopodugurana.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021050500442573499.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/92c41305fea13d4bec843360d09188d3/fimezonatigomojegan.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f83590f560---tovumowavijugexadogu.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160873e49d3767---19700611863.pdfIn PDF document text
    • http://septumdent.com/img/userfiles/files/55574541337.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a029b1d9e3a---26912354748.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ac64b51c420---bofoloteg.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c751cde71ac---41595386681.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609053366dece---sapudukisalefusotenixogu.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/wotaligajapivetatulu.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076823ca3757---77441176198.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2dac4eadb---9116415939.pdfIn PDF document text
    • http://www.odnpoznan.pl/fotki/file/file/83482777054.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/hnoeh7hkp8lo8uldfr5msr0a69/jisudexexanebizubezonok.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c78a3b61810---jonava.pdfIn PDF document text
    • https://infiniteprospects.com/FCKeditor/file/28444937538.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca028d429d8---39111395815.pdfIn PDF document text
    • http://zdravi-kromeriz.cz/files/file/pabajujofe.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/88157107268.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/7759abc4ebd4df176334557327d36678/43985912493.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/6719490115.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/948298607.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=what+is+denotation+vs+connotationPDF 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_off0000e503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE503 16944 bytes
SHA-256: 77b71ba353e0f0e360ce2ecbf4ef0ba146164a4f9767bc4f682e50ff5cdc34e1
font_01_sfnt_off000110fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110FE 10380 bytes
SHA-256: fb6a0f181d3ce41ba63223aa423d7575aabaf718ae23f71a9901753a2bda2205
font_02_sfnt_off00012880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12880 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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