Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f386ce73fadf155…

MALICIOUS

PDF

85.5 KB Created: 2021-09-04 01:02:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 481ad8c0a9ba8f1a9c225c03c37e36d6 SHA-1: 265cdb3f78850e56826c046c3ebc92296a4e2bbd SHA-256: 2f386ce73fadf155cf9f491593a1eed28baa0d6a8c85faac8deff8bde9d8fd34
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to disposable hosting sites, some of which are compromised WordPress uploads, suggesting a phishing or malware distribution attempt. The heuristic 'SE_INVOICE_LURE' indicates the document's content is designed to trick the user into clicking these links. While no scripts were directly extracted, the nature of the links and the ML classification strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://dailynewsodia.com/assets/ckfinder/core/connector/php/uploads/files/juzunogiromuxewuzed.pdf In PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/ptiajnm8brbdiu7pu36uqqpcdt/modawamefi.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f929063f14---bokoje.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/fc941d680e3d26ddc42757d5bb3143b9/71902247889.pdfIn PDF document text
    • http://everest-c.ru/ckfinder/userfiles/files/sebamare.pdfIn PDF document text
    • https://ceccardolj.ro/userfiles/file/28822191899.pdfIn PDF document text
    • http://uralteplostroy.ru/content/file/dijujivawovab.pdfIn PDF document text
    • http://lamarchesainterita.be/lamarchesainterita/imgdb/news/files/mipimegisolovaluxofub.pdfIn PDF document text
    • https://la-klamm.org/Files/files/nakejozix.pdfIn PDF document text
    • http://mtlebanon62.com/clients/5/5e/5ee551a8be14a26d7d76bc5e90dd1372/File/fubetame.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086168766b16---tabaw.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607349d2738db---visepapixanu.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/f900eb80b8b16973911f9cdb23bef1f5/79725477947.pdfIn PDF document text
    • http://giayviettri.com/img-ftec/files/20114073724.pdfIn PDF document text
    • http://icsbc.ru/fuploader//file/92377887842.pdfIn PDF document text
    • https://serka.com/serka/upload/files/sogapuxijopuwulimozer.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/3aee0447c81a7c92f6b154c0c1f82d29/ziwapupun.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/eklsn8rg5mjfo9kona0v36c2mn/73066015697.pdfIn PDF document text
    • http://a-b-i-s.net/layout/bilder/file/25355725395.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/e9db983166758ac8920585b85498cb38/21867852215.pdfIn PDF document text
    • https://sjamsul-hidajat.id/ck_uploads/uploads/files/wezilawasidonorisemiru.pdfIn PDF document text
    • http://nanopena.cz/upload/file/21871892976.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f50c38eb0---73782039326.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=utiitsl+pan+card+correction+form+pdfPDF 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_off0000e81d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001002f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002F 18300 bytes
SHA-256: fd06cf0460281e0d877da115abef0db0bbbb87fd05faaad50499764ba338893b
font_02_sfnt_off00012f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F76 10788 bytes
SHA-256: 368589a19b675d0cdf9b5b67a46da19f33d714f79330ff8d1e345be77bff51dc