Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee7c39cfabd3dd05…

MALICIOUS

PDF

87.0 KB Created: 2021-06-29 12:59:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: c9c66246e2b659a87127f839f9280288 SHA-1: 527075036c5c76339f182b7cae66bb2c2b92d4d2 SHA-256: ee7c39cfabd3dd0562616a9bc7412a7352fb1534a1c670c9079d758a65aac6bf
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites, which are likely used to host malicious content or redirect users to phishing pages. The presence of multiple links on disposable or compromised hosting reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/42d8cf38461fe69d5711d90e6eea451e/vujigivukubusip.pdf In PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/06bq5p6023ue5mbq696mt2doac/26296504720.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/df5f2c4ed3655952431bf257aa99713f/96550660313.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beafa76ef1e---witexulofexazi.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/svrh90t3vduot0n2sk2kl475c3/7927061938.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/84omn3h2q94fcst80g72qs8551/95670471771.pdfIn PDF document text
    • http://hotelgiottotorino.com/userfiles/files/xezixiseke.pdfIn PDF document text
    • http://nusratali.com/userfiles/files/10687716461.pdfIn PDF document text
    • http://safetypath.net/cms_images/6299378271.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c74c354580---21659887844.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/pedori.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/b768f7f1243371b44e7994959ad11c05/32835082016.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/a6ad663d9aa7c5a5e19ddd928d78b856/zizuwoxemoxurafe.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd7ea03e32---78963093286.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/27c962fca03f3aa186cbd6a19da272e3/44536530863.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1609657f5af8be---44353487114.pdfIn PDF document text
    • http://tovicetour.com/FileData/ckfinder/files/20210603_C2E2346EE5F27376.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/c09f6661c03ef4657f4105bc2f041745/93139415155.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160726d28d041c---87132931571.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/bupoj.pdfIn PDF document text
    • http://luvnchrlysenglishtoys.com/clients/861429/File/bafejerimuwav.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c4751bea6e3---24947065429.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075dd8ab31fa---mupopepotomezekijejevol.pdfIn PDF document text
    • http://munsusa.org/userfiles/file/20210518105331.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/72486512829.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=growth+in+nostrilPDF 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_off0000f5de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF0 16432 bytes
SHA-256: c522afd009039fac6c53631d9189011154744f7a5818a3a983bfc357923c5151
font_02_sfnt_off000138bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138BB 10036 bytes
SHA-256: 9d197a18ade2130fe7377558db0817eee61bb5dfb6674b56d751f38e818e0a24

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