Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f1e3cb136523c55…

MALICIOUS

PDF

92.6 KB Created: 2021-06-26 15:57:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: cbe79621ecf56af3c92cdca9c6e22403 SHA-1: bac10fe245ed27bd4485c94c5dfad0135265688d SHA-256: 7f1e3cb136523c5550d3b77b9502ed41938eabd3251eb834f25fbb507daa13e2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to compromised websites and disposable hosting, suggesting it functions as a link farm to distribute phishing or malware. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this, indicating a tactic to leverage SEO and compromised infrastructure for malicious redirection. No scripts were extracted, but the overall structure and URL patterns strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://allytemp.ru/uplcv?utm_term=mixed+reality+headsets+2020 PDF link annotation
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/c3c00baf0455d6ce8132f01096e8ffea/panupisezi.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16083440f24629---bonowinateluxiruxekanef.pdfIn PDF document text
    • http://feach.ie/images/uploads/file/veribusuvafebijofukuwasi.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/67862421712.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/kukevesu.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/f7c8g4j5576258ohqbfkifei29/lovagibadi.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/b12827509fd33cdcf1766bfe2ce3fd15/watozu.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a49c7e0408e---kowitowesasariwibinaj.pdfIn PDF document text
    • http://adveotec.com/img/file/romebabedukozavulezala.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/i80kcc60ok5aic6816up3e59m3/7618220690.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/kogusiwutelop.pdfIn PDF document text
    • http://indel.sk/userfiles/file/66770140873.pdfIn PDF document text
    • https://dolmalatrek.com/userfiles/file/natewusanivafu.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1609b41c03c59a---masidemetuwakufub.pdfIn PDF document text
    • http://domplus.su/userfiles/files/gowaruri.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/56512294488.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/dodivavuxawufife.pdfIn PDF document text
    • http://timebank.ru/sites/default/files/photos/pagefile/pupazomumovajas.pdfIn PDF document text
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/fukodalidesalivomaxurub.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b04c16d1c98---xaperiboxobelevilakuv.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/pps3t0f9cbckrea3m3qc4rgusj/gomexebisarupuboniv.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_off00010729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10729 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011f40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F40 10572 bytes
SHA-256: 41bd5b2879d47915aaebfdc0e8f2d25b3410b311c4a835bc6c586c874c62d64f
font_02_sfnt_off00013796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13796 17460 bytes
SHA-256: 9b67660511b6a5fd8008c945245971d4063bb007cb2d226f7a77ddb81eebc2d0

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