Malicious PDF — malware analysis report

Static analysis result for SHA-256 8237ab49a09d0402…

MALICIOUS

PDF

72.0 KB Created: 2021-07-05 15:45:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 0b3429f153f34dff126140ca74265ac5 SHA-1: f4be9d211f927d394dcf8a7a5ebc6c3ac44e9f2a SHA-256: 8237ab49a09d04021c729532a70ed2dbd43bb63710afd88af20131a3ca201ffb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and link farm patterns, directing users to a variety of domains, some of which are hosted on compromised CMS platforms. The presence of these links suggests an intent to lure users to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://crewmak.ru/uplcv?utm_term=visual+basic+excel+functions PDF link annotation
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/52477097409.pdfIn PDF document text
    • https://adian.eus/files/galeria/files/borubaxuxaweverujos.pdfIn PDF document text
    • http://cabin4kids.org/clients/0/05/050cd0fff5f75fdfd14851583cc0de74/File/73931520245.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4b074ee76---dosajovafexegizajarixij.pdfIn PDF document text
    • http://fireprovietnam.net/luutru/files/viloripuzulu.pdfIn PDF document text
    • https://biothiennam.com/media/ftp/file/verozagojap.pdfIn PDF document text
    • https://brtim.com/uploads/wysiwyg/files/papekataxafiwegitipa.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/35320704785.pdfIn PDF document text
    • https://webvitamin.vn/app/webroot/uploads/files/28422262111.pdfIn PDF document text
    • https://baongochoa.com/upload/file/nisufi.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/c4986d37b0d82913b81b5b11e4902b1d/tadivifofabofetexip.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/d3a9e5ffb238660d5526735113755704/juzekupelixal.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6b886b49d---57941448966.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3fdaa5f70d---pezogopaxise.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be0230d8a84---97514650558.pdfIn PDF document text
    • http://bobas24.pl/Upload/file/11094885072.pdfIn PDF document text
    • http://tuhs1970.com/clients/a/ac/acc339db084e87cdfae31a76a6c96f1c/File/87459686887.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/tutarerin.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/e7e1dbe13faf0382b79d50b2c9605f55/ledarezujopebuf.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/f117asoqbjj9urioi7a5bpm6ik/tadajutujagore.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160755f7089706---mepatof.pdfIn PDF document text
    • https://mszukam.pl/dat//file/27104447083.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad1c8edef2---7479420770.pdfIn PDF document text
    • 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_off0000b8f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d10a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD10A 10540 bytes
SHA-256: 80dd4571d6f309a482dfc6e1520b2dfff8b253e2c94c8d11aadd8ef70a4879fc
font_02_sfnt_off0000e93f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93F 16100 bytes
SHA-256: 2e2090afa19ab1033c7ff32e9fc6f2b4d634911304bb45bc74ccade4ce15a4f9

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