Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a626f1f353e31ab…

MALICIOUS

PDF

107.6 KB Created: 2021-06-26 01:29:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: ec83bd54e95293f039cc16b8cad3f285 SHA-1: 7fd2c93f3ee1549879db9a4d95c71d66ec2a0723 SHA-256: 5a626f1f353e31abd67d9a2fa569b7d1ca612f8d083cadbd4cc976fd291faf02
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of links, many of which point to compromised WordPress sites hosting further PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. No scripts were extracted, and the document body was unreadable, but the link farm structure and heuristic firings are sufficient to assess its purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://primax.fr/wp-content/plugins/super-forms/uploads/php/files/198bh614q55j4r8ivl151qurt2/27635732673.pdf In PDF document text
    • https://daismene.it/file/15853885275.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/9226b7f2f102ec133322e16bca7b72cf/21625558477.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0ebcdf320---49176198051.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/66bf4f104a3df63d596103c3fd4bb1a4/82550972702.pdfIn PDF document text
    • http://se-ty.ru/uploads/userfiles/file/gofemofunutotezoriwu.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/eeda5d81875048ccbc7401286f011396/68678037523.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/87451777730.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071656800a56---7358278568.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/5876362688.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/8ef87981d7e2442d046fc7b994b06870/83907571652.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/498a442bc980cd9679e892c0c5a65f9e/kokofibonukejunana.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/1d7ac50a3578d05716ca2d5c618f8105/sokove.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/f11cd5c509979881422efb4a8a7a9ff2/32754996523.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/6710262310.pdfIn PDF document text
    • http://fontanarosaserigrafia.it/userfiles/file/43389025006.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087afaa16df9---suminusozuwobagefowesuka.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/rifemisenulasixokofevaboz.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/qal6dlvvs0c66b6ahvhhgdsg2l/sazuxiraxuneje.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073bf4697b13---mupekiwazogunigidonixekix.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/8o9329o65qglipj023j2nqk07l/82573883807.pdfIn PDF document text
    • http://coyada.com/up_images/up_images/liboxizipofe.pdfIn PDF document text
    • http://monroehighwildcats.com/clients/40160/File/gepijop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=universal+affirmative+proposition+examplesPDF 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_off00014293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14293 10692 bytes
SHA-256: f17847d5fed7e01a312338c070d3bf099b05e4e5542f6de5b0449344e3632402
font_01_sfnt_off00015b23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B23 17460 bytes
SHA-256: 86dfc1caee46d242061eaeaf33ef2c334acd4a07c2748b37761e856bee667c06
font_02_sfnt_off00018923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18923 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1