Malicious PDF — malware analysis report

Static analysis result for SHA-256 33471326eb25628f…

MALICIOUS

PDF

74.9 KB Created: 2021-06-27 01:51:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 1aa98bea5c3bf6c91d62429422bc257f SHA-1: 86114b8f4c89640f0b31a1eccbca10287b9edb3a SHA-256: 33471326eb25628fe6865f36be0e5ffced813864029ae8a5c1ee02be7905be04
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript and a large number of external URIs. These URIs form a link farm, with many pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The embedded JavaScript likely facilitates the redirection or further payload delivery, aligning with common phishing and malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://crewmak.ru/uplcv?utm_term=phrasal+verbs+in+context+peter+dainty+pdf PDF link annotation
    • https://uetty.xyz/js/ckfinder/userfiles/files/buvovoviz.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/gitibolusurumutox.pdfIn PDF document text
    • http://rideco.hu/upload/file/9494554653.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/1b7c44f1c8d0f4b805d42e2ff2f72418/kidova.pdfIn PDF document text
    • http://simonide.org/userfiles/file/rujufiru.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/27e61a0d0801faedff46566f03fa04a5/gezaseledajebesavifison.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/c2c63faebb286c07ca25cffba7142a9b/82927217384.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/5e374ulm1uu3en231254999130/76194539887.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/vunumozixama.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2bd67e80af---notusa.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c998a4b7db---80461250795.pdfPDF link annotation
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c63c52695---3103667153.pdfIn PDF document text
    • http://cbestdesign.com/ckfinder/images_store/files/34255098680.pdfIn PDF document text
    • http://ebiocell.com/uploadfile/file///2021062019100577.pdfIn PDF document text
    • http://coiffurenais.com/userfiles/file/nuwisepuruv.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160894b1318f0c---zidumigefelemofirobudiko.pdfIn PDF document text
    • https://summit-christian-academy.net/scauserfiles/files/pofugid.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/3718857178.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16071b14630871---kunisuvilufafogo.pdfIn PDF document text
    • https://catwalkdogcome.com/editor_upload_image/file/42074195267.pdfIn PDF document text
    • http://be1971.com/clients/a/a1/a19be2fc4cf8b198b52f296748481ce5/File/najixilijomuwu.pdfIn PDF document text
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160818003244fc---48575624586.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/e6e238b03b7ac453954d37b9eb33032f/87493513835.pdfIn PDF document text
    • https://x-software.cz/data/file/58112674690.pdfIn PDF document text
    • http://waltwhitman1964grads.com/clients/6/6c/6c9ae932573016e5ff31759a10dce4b4/File/lunofodo.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160799f2a4979d---zubufamixa.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_off0000c152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC152 11140 bytes
SHA-256: 2d8b3d33fdab985939aca3eaf7ad63f2b7435674b3390d59d17aaac74c5635b6
font_01_sfnt_off0000db22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF334 16876 bytes
SHA-256: 2366a6012fe6b5f946764123b7cb7d449fb6a567482ae1c08d244cc6cf3e004c

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