Malicious PDF — malware analysis report

Static analysis result for SHA-256 f71d85e5791a5419…

MALICIOUS

PDF

71.7 KB Created: 2021-06-26 09:16:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: bef54e1f1447cf58e06e26dc64a319d3 SHA-1: fe45966b5e204d33c022f095a59175d35fc22e9d SHA-256: f71d85e5791a54199d472ff0c03dfb27e744e998fba55b6885afa7d38fe82dbe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links pointing to compromised WordPress sites and other domains, suggesting it is part of a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to lead the user to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://archism.ru/uplcv?utm_term=pain+just+above+left+hip PDF link annotation
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/36ee3f9d39666ad621d7db4b8c81848b/lumubasigoguve.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/27734248676.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608dac54efcb2---41466259177.pdfIn PDF document text
    • http://3sdent.com/upload/files/83007071667.pdfIn PDF document text
    • https://miguktour.com/FileData/ckfinder/files/20210603_1766696E00EC4A5F.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160707f690fe2f---podenofeladodusolotobara.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/ssct4rpu217mr7e6eechrc3cm3/16526625918.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/57800345665.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16099e23396305---lazokupujevole.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608360dbed705---fijodizabepibamexanavegir.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4ee384ad6---masowol.pdfIn PDF document text
    • https://jokerprod.net/userfiles/file/2389606629.pdfIn PDF document text
    • http://ticaproduce.com/ckfinder/userfiles/files/rakomedakifodo.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/24bc9a2c8c845fccdef9f53735cd914e/vibipudipiwi.pdfIn PDF document text
    • http://guanzhuli.com/userfiles/file/71308778200.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/zexosadulu.pdfIn PDF document text
    • http://outspokenholland.com/userfiles/fckFile/20210618191930.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16099a39779d15---85529685005.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab47163d8e2---67438245364.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160bfc4f4aa6a5---xutabu.pdfIn PDF document text
    • http://appletechsolutions.com/userfiles/file/komutuxapodigupagufiwi.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/edb497ec8db63cd324b5e8e5a91aa638/rubafosoxopu.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_off0000b8a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d0b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B5 15268 bytes
SHA-256: 52fc798dcc2366ea9cb9ba158bf0eb0e47167f353aead2dd632a6190ac89969a
font_02_sfnt_off0000f7b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B7 10792 bytes
SHA-256: d7957b99939651029aa13287eb5aa004fc24582dc47329ca7b0d4f7307847de0

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