Malicious PDF — malware analysis report

Static analysis result for SHA-256 e690babe1646638d…

MALICIOUS

PDF

88.3 KB Created: 2021-06-30 10:02:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 07675fbd7087d021798b5a64871d9b61 SHA-1: 6fbd8b26e5b74e338f75dc01d912c1f006c62882 SHA-256: e690babe1646638d0669c8d035ff30ee7b1ebe53699246f4ddd6c523520d27ce
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution intent. It contains a large number of external links, many pointing to disposable hosting or compromised CMS upload directories, suggesting it functions as a link farm to redirect users to malicious sites. The presence of multiple PDF link farm heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://kirilmazbardak.com/userfiles/file/17515995222.pdf In PDF document text
    • https://regiefranchet.fr/userfiles/files/xibuzadafineronakapumutag.pdfIn PDF document text
    • https://bio86.net/fichiers/39928805436.pdfIn PDF document text
    • https://teenvolunteerhouston.com/wp-content/plugins/super-forms/uploads/php/files/5208be9b264f54d364adac545633454e/56871262698.pdfIn PDF document text
    • https://e-uchebnici.com/img/file/taganedovakugomejono.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/80667849323.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9095d9cb1---fifuzejomaripiverefi.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/he6q6g20qhl8mv2bcjqg37dke1/jazidobatenujolinepiba.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-12/20210512154858659053.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607230dab4f77---wejuzuj.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bac024cacf6---felisozabelunebajojo.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/c70f457ac3e9d2faca8dfd604587d990/96602916929.pdfIn PDF document text
    • https://peilimineko.com/userfiles/file/49822831824.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080080f078d1---22129252901.pdfIn PDF document text
    • http://networkinglikepro.com/ckfinder/userfiles/files/24191586596.pdfIn PDF document text
    • https://montpellier-business-plan.com/mbp/upload/images/images/upload/ckfinder/goniwes.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/11ee535a93fc33a3f06153c5e078072f/rimati.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608b73e2eda09---827542217.pdfIn PDF document text
    • https://flyags.com/editorResources/file///sikidoxasujasaderejozuk.pdfIn PDF document text
    • https://filetorme.com/upload/files/fularomipepuporikaw.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/b5016f077bcb27a2a358608246db843d/71822396477.pdfIn PDF document text
    • http://ettorebelfioreliutaio.it/userfiles/files/mamiwijuzejagozo.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/4b0425204b4fe16e779b880537e88f86/bolonufafugelisijalatow.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9631683bf---borajosotijikek.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/b170a7602b69f88153dc269182f28fbc/vurezugufolofagukirirageb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=my+tooth+is+decayingPDF 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_off0000f95c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95C 10608 bytes
SHA-256: b91f65533d5e98eb520a5e7dfe2ea8e0d46228ff2beb3744a2c04e382f75f940
font_01_sfnt_off00011165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11165 16496 bytes
SHA-256: ad0eea910dbf1484ff978d3c37945b58061bd4688abecac7cdb15bc0d50c19de
font_02_sfnt_off00013bd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BD5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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