Malicious PDF — malware analysis report

Static analysis result for SHA-256 50f9086d9943b500…

MALICIOUS

PDF

141.9 KB Created: 2021-06-27 19:54:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 896b7e1e6481512a972280422d004e37 SHA-1: 18f962aac23a9dd522a77afb3bbb97b6ef699a62 SHA-256: 50f9086d9943b500e42c093cca887337297f1a426856c4a10a003a726d6ca321
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many pointing to compromised CMS upload storage and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the structure and URL patterns are consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://avenue102.com/uploads/file/tewewumokej.pdf In PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/90d3dfb637aa300487dbc27fa2404620/redemid.pdfIn PDF document text
    • https://rcot.org/userfiles/file/sanefemoniruxi.pdfIn PDF document text
    • http://narnivet.com/userfiles/files/jibagodajujoruni.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f182dd98d---22864550220.pdfIn PDF document text
    • http://93564497.com/userfiles/maragaluwodaxusimi.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b28c647eca3---numifuj.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/60ba28159b47a5284384cb54ce5ced7c/94117909112.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608edae2e8735---bovonel.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/4cc79ac3345a704ffc0342605dc1a5a4/19657024518.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160ad203a868ef---topidogogut.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/408a27dce4b871ed67c5370cef09001d/zunijujamivigefaj.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/36999419319.pdfIn PDF document text
    • http://fotostudiovaccari.it/userfiles/files/mitewep.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/verinejimosakuja.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607471b5c0fad---43720724879.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b60f90dbe38---6257666665.pdfIn PDF document text
    • https://www.anandtirth.com/wp-content/plugins/super-forms/uploads/php/files/m6drf95ag1o4h0p91s8kn62bh7/zinosuzuzeferunine.pdfIn PDF document text
    • http://trendstyleimage.com/uploads/ckfinder/userfiles/files/vubul.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/lpsv2eumqp73a1026tdap1mc94/2047909699.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/p7qbbl37lnh3k6n5fqaq5lvu93/91232991101.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/kebedevo.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/l6s21tbq65l5uhr9a24rm8e0b5/45234212574.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608609959c9cd---tupabewej.pdfIn PDF document text
    • http://apricomm.com/userData/board/file/xuxifibuzemofinagi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=types+of+agricultural+cropsPDF 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_off0001cac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CAC0 10728 bytes
SHA-256: 9c4c97ad6d6c5da5783816862e373b00a0718eebab4ac1aa2674a2dcbff0cadf
font_01_sfnt_off0001e39b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E39B 17772 bytes
SHA-256: dce9ea9f6436c50b6c9ceeff21c45642f620a4aab2fa2fd22d4e0b06ddd0f99e
font_02_sfnt_off000211bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x211BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1