Malicious PDF — malware analysis report

Static analysis result for SHA-256 49358f129262d135…

MALICIOUS

PDF

72.1 KB Created: 2021-09-02 23:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5c5f5ea2f72301ae82290e910502491b SHA-1: 9b77810ea8c52040b0ca6689858af222ea1a4af3 SHA-256: 49358f129262d135e35d2f06cd9c62f603b7d3d11ec914ece2bd1b3675ab0cae
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised websites that likely host phishing content or further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for these links, suggesting an attempt to evade detection and distribute malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6364

Heuristics 5

  • 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
  • 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://myphamlulanjina.com/upload/files/dafok.pdf In PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/gabete.pdfIn PDF document text
    • http://www.siscbolivia.com/admin/uploaded/fck/file/65418013603.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/66de62b332e54a261126bc808347c995/giwidi.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/burozumukava.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad36a97160---10454699372.pdfIn PDF document text
    • http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/xinebuxosuguwesu.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/d3jrd8rh2062u2334okcmcf279/73590784865.pdfIn PDF document text
    • http://ghioroiu.ro/sites/default/files/file/zebakufumunopijagipuju.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/79edb4abbf5dcacd25ac4ad65c2f5e70/tezakegonopagiwin.pdfIn PDF document text
    • http://didula.ru/img/file/gonusevuvosonidaruni.pdfIn PDF document text
    • http://scandirent-new.ru/uploads/assets/file/lovosaguzedefujawopazeg.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/d39fee645ed4f8eb1470e6e7c928834b/15716599697.pdfIn PDF document text
    • http://radissonhoteltraining.com/userfiles/file/36790608131.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/79623606418.pdfIn PDF document text
    • http://bean2beenefamilytree.com/clients/60578/File/nopumobarukip.pdfIn PDF document text
    • http://ecole.ru/text/images/file/93594668047.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16085612feea6b---11438089421.pdfIn PDF document text
    • https://ingmarcomantovani.it/file/zedonelikemopasip.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160eca4751da81---13409275943.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/db82a65c8993aab9de3ea7f06c12315e/jifowuwuronu.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b8d318ef558---39479676330.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/84fa4f73af7eb79f8d7d7ea624da5483/57257664362.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=samsung+a30+mobile+phone+manualPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAD 18456 bytes
SHA-256: f340828b6821cdea2d68829df281c5548b55ab58c9980ebfa963a6a87bcdf539

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