Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb7526b05dee6cde…

MALICIOUS

PDF

87.9 KB Created: 2021-06-29 05:51:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 14acb9d04deae1e0a28de0fe4980c284 SHA-1: 0de6343a1823b9472ae4aa1e290c485ef135f037 SHA-256: fb7526b05dee6cde071f7a77b90dcf7e3c78ab53917fdafc69295504d861025d
156 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, directing users to numerous external URLs, many of which are hosted on compromised CMS platforms or disposable domains. The primary intent appears to be to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/jvs1qg0mv5jbdemj75ab895oqr/76247401134.pdf In PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/48501830075.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4dd1020bdb---vexitamuxis.pdfIn PDF document text
    • https://clinic4lab.com/upload/ckfinder_temp/files/20210618095953.pdfIn PDF document text
    • http://surtek.biz/image/files/20150118_203528.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094c0b51cd7a---vemij.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/ea90a95f35466059c887515ef15ca32f/xuluwowulowoxolinuv.pdfIn PDF document text
    • http://gocreate.termall.pl/upload/fck/file/lukakerosat.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/559082ec74f7d163db31585da66c997f/49453307761.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/58765349362469a2ee2f0feb05586968/repixifazeseje.pdfIn PDF document text
    • http://myshopekerala.com/userfiles/file/27898641278.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/f5b5830424285aaadf697bb8d11866fc/50639452410.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/l4j75o75mo66sl38h5q7c3e6vd/77867472728.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2ef8dad83---rawutuf.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/u4u6ogo27hspacdkjq1bmkr2cf/bibilajerabutogarowalirel.pdfIn PDF document text
    • http://happyland-nsk.net/ckfinder/userfiles/files/21291891294.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160874cf5e8768---13653006831.pdfIn PDF document text
    • https://baobihungphu.com/media/ftp/file/86600259182.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b0513ed6b14---memuxofumi.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bac24d8495---48476260338.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/56985874647.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160834b7c3c117---sekobivomakivamugajo.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6aaf26870---wowanoxozaxufeposurezo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=how+do+you+find+redstone+in+minecraftPDF 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_off0000f528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF528 16696 bytes
SHA-256: 2612b949b84cc5c8c4055bb304baf440ea1fe3c82f73927e4cac7b40c5273791
font_01_sfnt_off000120b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B3 10884 bytes
SHA-256: 81253a598abb7e508f93725b6f938c087a6b13ebc3349d990cc2f502acfd3b32
font_02_sfnt_off000139ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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