Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb6629417af53bc7…

MALICIOUS

PDF

89.0 KB Created: 2021-07-03 21:52:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: ec9c3e5ad6aaf7cf32bf62f655824142 SHA-1: 6a83379e1f508f8ca46e19d3f012900e454caa55 SHA-256: cb6629417af53bc7088b845fb36a37c603121e352b9a1e30323351d19fdb31b2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection for phishing and trojan activity. It contains numerous links pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/2f3133e50d63d64d7b892f8f341e5ac0/rogutigilepe.pdf In PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16094d8eae632e---90325799848.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/wivasogujetafisosu.pdfIn PDF document text
    • http://air-ned.com/uploads/files/lagalabegadivewas.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/bf158f0c0f536b2353039d573acf09c7/43132820089.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071411e321ba---55280567479.pdfIn PDF document text
    • http://shlawllc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sufef.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baec80b161b---12305726099.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/802ded8d12edfcf35df8f0f70233648d/70788973377.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/drl0k6tck31umlu45nr5dk8cke/gupaxafibitukefov.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e96c87f45a---fixejubume.pdfIn PDF document text
    • http://spadhotel.com/basefile/spadhotelcom/files/zijalovexudelutedoxake.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/1qav9q1t3jkhqpdrpio2mp7jq0/67771717417.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///rikukedujifokume.pdfIn PDF document text
    • https://shen-su.eu/gfx/userfiles/files/3338824753.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6adf604c56---28579533357.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/84699739539.pdfIn PDF document text
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/db21bda565c4bf69d2f1210b44108fd4/kodasiserofaruwomokijom.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16093afc478f9a---64945954753.pdfIn PDF document text
    • http://bouncebodysupplements.com/newerac2c/userfiles/file/nozezusoromewedere.pdfIn PDF document text
    • https://postelezmasivu-praha.cz/ckfinder/userfiles/files/76926323504.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cdc81afe8c---didavowadine.pdfIn PDF document text
    • http://aquatrustfina.com/userfiles/file/tunaf.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/fa7eba7a9e7dbacc9441a4417e9268a8/saxeri.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=brief+summary+of+the+necklacePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC4 17772 bytes
SHA-256: b9fb9b5fa078f7dffbf029f25581d17c27ef502eadfff3ae90da80bd5b8f4fd9
font_01_sfnt_off00011afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AFA 10960 bytes
SHA-256: 738b1f25147cb0f97b50e42b53da6a0c8cd9d6f75ecb37a956c4e86e38f85860
font_02_sfnt_off00013448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13448 2372 bytes
SHA-256: 00eb975dcffe434aaeba46b7235ded4e908230d109feb8fdbe236371db421cd0
font_03_sfnt_off00013e69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1