Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3eeabb5d33d18dd…

MALICIOUS

PDF

76.5 KB Created: 2021-09-06 21:22:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7547e8e8c89de76b4f0ee68a2a497c50 SHA-1: 3f7c4e76ec4ccc7bc524e0ff6d17e99f32a1f79f SHA-256: d3eeabb5d33d18dddb724acd65a1cb2191e3df6c7d19ccb70d9dc70318948b9a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, indicating a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://pistant.ru/uplcv?utm_term=manual+test+for+blood+clot+in+leg PDF link annotation
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807f15e4e8d---gagarozufuwufevesukagudi.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/wetabuxodujuxuwibalexogeg.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/18927283714.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc17920f168---bifuwiliwi.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/72077246043.pdfIn PDF document text
    • https://sonarmusic.hu/up_image/file/16303409932.pdfIn PDF document text
    • http://hoggard1975.com/clients/a/a4/a43fc1111b7ad4318f8b553feb79a890/File/naselegubesuduz.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a5de39b7a46---pisudixi.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/l8ad6lkal2mljqak3o34koha4r/84319739435.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/a51a9d66f1fa6c2b8ff529b227064473/71344290117.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/dj8jal5cv1nft7fl0vv67fgda7/lesufemejojure.pdfIn PDF document text
    • http://teplolux72.ru/upload/file/42326382478.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/fe6da97a0543b6fd579fe2a88ef7f17a/50269775900.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/jopebusu.pdfIn PDF document text
    • http://cathugo.de/res/wysiwyg/file/fuzegukozipumemuma.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/86112f9982077f946df6d63513cb1a46/5455168474.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ab6f40a5de6---18739268993.pdfIn PDF document text
    • http://skulpt.in/admin/uploads/file/fulodewipow.pdfIn PDF document text
    • https://wroclaw-effatha.pl/grafiki/file/jutotuxokupimab.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c06665efec---rejapera.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/c87023db0f9f5efe997f81c15e10d98e/wijelokujewamat.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160d2261d9c2cc---33681377415.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/mavurojedojekibuzinaju.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_off0000c866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC866 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e07d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07D 10884 bytes
SHA-256: 58b37edd489b23dbd0950f639045b223e1a7471bdd3503b15039fcdef572e083
font_02_sfnt_off0000f992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF992 16460 bytes
SHA-256: 0f6d46ddf02e6edd7abfeaa3c356ffaa0ebdf3cd8dfb9a3c404bdc6cbac60197

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