Malicious PDF — malware analysis report

Static analysis result for SHA-256 030272a42c00941b…

MALICIOUS

PDF

80.6 KB Created: 2021-08-19 17:28:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: befc2c11bfdccb4f660fcbf177321279 SHA-1: e16464b9847fd26baf6f4343baee3ffe367e59b7 SHA-256: 030272a42c00941be62f8ef8175fc484ad85b45801ba19a623521d2af15cd3a0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs that point to compromised WordPress sites and disposable hosting, acting as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing pages or download further malware. The file's structure and URL patterns are consistent with a malicious document designed for initial compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 https://huntic.ru/uplcv?utm_term=como+puedo+ser+mas+inteligente+emocionalmente PDF link annotation
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/e4d0dd0afc6a15cc1a3575da61c6d86f/lapejimudukaba.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/disarajak.pdfIn PDF document text
    • http://maekalocal.com/Maeka/UserFiles/File/jebiwigadi.pdfIn PDF document text
    • http://thermogroup.ru/uploads/files/64933845838.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/lonikenofevisida.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/0cc83fe6a30d3b92a7fcfdf07c73bb73/baduta.pdfIn PDF document text
    • http://ceroki.com/image/files/borufukubapedubobarar.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/b5f1418fa8c30b9d115e85b4bb410f70/47004209591.pdfIn PDF document text
    • http://shopcloud.cloud//ckfinder/userfiles/files/dalatikuguwumo.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/01e89a8dba3c9a7035c336218d1937ef/46346800086.pdfIn PDF document text
    • https://coebmsf.com/userfiles/file/93217342159.pdfIn PDF document text
    • https://faltprasten12.se/anvandarbilder/70/files/papatopuloverikepizudawi.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/97722601639.pdfIn PDF document text
    • http://murielbellhomes.com/userfiles/files/vutom.pdfIn PDF document text
    • https://silverstonedevelopments.com/ckfinder/userfiles/files/sasogedexexevarujenedo.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/5509189461396af43dc9a03b31f6e66c/tuwowadafaw.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16074b324b5dc0---85978481515.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b28147559f4---15083729399.pdfIn PDF document text
    • http://sun-tes.ru/files/file/benaturatusezupuzute.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606efc9b1c308---1535409327.pdfIn PDF document text
    • http://allnatureint.com/userfiles/file/josameb.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_off0000d74b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD74B 10988 bytes
SHA-256: 432b4acf6a9391439a76e4dd34fef7dec0fa3aeda9199f0194c8e1bb156780de
font_01_sfnt_off0000f096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF096 16816 bytes
SHA-256: 968a06c2f9070f2da625029573e79126b0057704dec787f5d113689db30d062a
font_02_sfnt_off00011ac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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