Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e937b2650dbfa44…

MALICIOUS

PDF

212.6 KB Created: 2021-06-29 08:13:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: c4d1ef74a13efd18efc004bfa164c071 SHA-1: 25f9544107a1bf9ddaaaa2e4e9e1b680abab2e49 SHA-256: 7e937b2650dbfa44d0bbc1279f73efc679238a1550269344e3ad259474be92bb
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics indicate it uses a link farm pointing to compromised WordPress upload storage, likely as part of a free-download phishing lure. While no scripts were extracted, the PDF structure and URL patterns suggest it is designed to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9145

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/5dacovodl933eq6r0ai0rg74d3/jisemozobegugagabunuj.pdf In PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/6piotvo3tacuinih2g2ugnfeb9/50080602800.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160927aae35904---rumusa.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca37658c42---61150090113.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/kt9lj148tgko2d87a802gv31oj/99388423362.pdfIn PDF document text
    • http://xn--80aamdqpfpr.xn--p1ai/upload_picture/josixuvukusisovexibiwexi.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/sfs40358e64pgoe7ojivtg4uk6/60539463426.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944e85b2b01---gesakawibopewijejorumola.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/xuzinofobofanidowopamaxi.pdfIn PDF document text
    • http://thanuyentea.com/ckfinder/userfiles/files/2778433997.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/46dc984fe302367acdbd6c96cc1b8244/17747857495.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/5b57521ec11ad87a2692a4f09eb489f4/vevakopuvoribesoxo.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/k5v4fdq9m9lh8r53l17dhdube2/navam.pdfIn PDF document text
    • https://dm288.rs/slicice/file/jujewilubixatofuxago.pdfIn PDF document text
    • http://controldellaves.com/app/webroot/arxius/file/83109417612.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160848584a7233---novibezugukadagovuzexu.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/vtvmkm36upk6g5p9bgk90pevms/wizapavedu.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d226028b3---pofok.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/5mcjue7ueha3efnvkdcftf040b/52635760461.pdfIn PDF document text
    • https://soechi.com/userfiles/file/gebiwoxosatisilud.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/32f46369baab74c8198ce5d9d20ebc95/pegujabusometuz.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a59152a4d8---rutobulivolafudal.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c35304534e---reditapu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=naruto+order+to+watchPDF 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_off00019fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19FBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001b7cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B7CC 126912 bytes
SHA-256: cfd8c4e141f9b0d6e2ab5a882175056789e6debd407800f051258046110a4ccb
font_02_sfnt_off0002fcb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FCB3 18848 bytes
SHA-256: 2340cf30b06283af6511e2b833e9ac4fbea1325f785cee78f275ad9552bf6faa
font_03_sfnt_off00032d51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32D51 10220 bytes
SHA-256: f7a61b2f383d9d61d78f6cf71d7b72930b0b3a079066bfd18fc5072ad6311ed7