Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f9a08163ade1ed5…

MALICIOUS

PDF

74.9 KB Created: 2021-07-02 23:42:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 4b3ce89d6337923de57a0efd10a254ea SHA-1: fd23df3148553a5fa47024383a6a61ed6c4ed419 SHA-256: 3f9a08163ade1ed5a411a1e375e94e777ec82e5838cb08f5d5a5e2eeeaa7db6c
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of links, many pointing to compromised CMS uploads or disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish users. The embedded URLs and the PDF structure indicate an attempt to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://mtmnetwork.net/uploadEditor/files/xitet.pdf In PDF document text
    • https://ikima.fr/uploads/file/xiwirigawezilix.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/b528944606b911a5c1b58af1812b0de9/83341773353.pdfIn PDF document text
    • https://vegas-shop.net/uploads/files/42140790123.pdfIn PDF document text
    • http://jaatkinson.com/userimages/94175503401.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7bcb57321---56891210162.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b950e717f1d---fuluwodizisugagoso.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608800a93acc8---mupabusigitim.pdfIn PDF document text
    • http://sbs-group.co/userfiles/files/pogunawilogubilaw.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/4498065467.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b9027820ef1---32156068685.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b854311ab1---12862424885.pdfIn PDF document text
    • https://burkina-businessschool.com/business_school/uploads/file/tefipigupadilezuz.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/bb8ca607ae4497beb1f9a263aed84c8d/tutazuxuseretunamazisipu.pdfIn PDF document text
    • https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/nrlnjaas8c8h5uc68dq6p52efu/ketimexiratavetal.pdfIn PDF document text
    • http://soles2walk.cz/data/file/17411251317.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/e26bec695c97fb5a82e5e0819343a687/15103462161.pdfIn PDF document text
    • http://diamond6ranch.com/userfiles/file/pisugapijana.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c5b7b69d0---84393737421.pdfIn PDF document text
    • https://thaiahpa.com/flash/files/46380428670.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092da923e624---xalugo.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce66751662---rijolusev.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/dd1138f4608e62cf206994faff053790/bixegowakos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=equal+employment+opportunity+formPDF 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_off0000c520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC520 15860 bytes
SHA-256: 6969d5db0fcedd05c1166757d3f00d0bd5b79286f44aa3e21bf7c8c97c80d72a
font_01_sfnt_off0000edb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB7 10692 bytes
SHA-256: 8bd3760158be167453ec80787c3c971fcce8c203ff25c93b3cb677061a951286
font_02_sfnt_off00010631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10631 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1