Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7815df4a053e059…

MALICIOUS

PDF

87.2 KB Created: 2021-07-07 23:46:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: c781bbce2d9d0c4cea26d18e4304bed8 SHA-1: 5c26053b1c88b5c41eba69f63424df1c8c9ed380 SHA-256: e7815df4a053e059bacc05acefa6e5ce0905d7fd75c61e9a9a3794cea63ae9ab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is a PDF that contains numerous embedded URLs, many of which point to compromised WordPress sites. Heuristics indicate these are link farms designed to redirect users to potentially malicious destinations. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfdcdb172c9---sudegukamawijewisagome.pdf In PDF document text
    • http://sevimticaret.net/userfiles/file/78983268107.pdfIn PDF document text
    • http://billsky.ee/files/file/64658172143.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/jitojesifusofemize.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608715a1639a3---71869046322.pdfIn PDF document text
    • http://circolonauticofavignana.it/userfiles/files/81690424804.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/18583197601.pdfIn PDF document text
    • http://pechati-piter.ru/userfiles/file/71434387270.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/fokojivilolukinodajuto.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160dc99049662a---bodudekowadupod.pdfIn PDF document text
    • http://bukharaalpharetta.com/sites/default/files/file/suwopot.pdfIn PDF document text
    • http://color-gateway.com/userfiles/file/81876641888.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae7419e9c65---1346096020.pdfIn PDF document text
    • http://kantoromega.pl/userfiles/file/feliwovimilemi.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/jue6203n9n5jfqir9i3h0lr9n2/rurikik.pdfIn PDF document text
    • http://slippersymposium.com/clients/875641/File/67945181063.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/bc5782e3dec66b3b54a1ae42a88d5ef8/niraxobidiluxunofu.pdfIn PDF document text
    • http://agro-vostok.ru/userfiles/file/ligajibalijisatukovosojis.pdfIn PDF document text
    • http://4grd.com/cmsimages/file/61575111827.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/ef7f429403c2583abf0f39d4ba904768/woxube.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4b1e9ecd6---76787916862.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093af9467f5a---17394313284.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=a+normal+blood+pressurePDF 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_off0000f2a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A8 17400 bytes
SHA-256: 575cb2d81b7c49315ba4abf3493d5a0720d7d45b81ab583c23bcc9bde67c362f
font_01_sfnt_off00011fe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE6 10584 bytes
SHA-256: b806826a83b405e88e7e491c97243c0293a5f91e3031da367f06a575ba5247a0
font_02_sfnt_off000137cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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